What Causes Mercedes Benz DTC P1570 and How to Fix It?

Mercedes Benz DTC P1570 indicates a problem within the Drive Authorization System (DAS), leading to engine immobilization. Diagnosing and resolving this issue promptly is crucial, and AutoExplain.com offers expert remote support to guide you through the troubleshooting process, ensuring efficient vehicle repairs and minimizing downtime with key programming and module programming. Our experienced technicians provide quick and reliable assistance via WhatsApp or email, backed by up-to-date knowledge and state-of-the-art diagnostic tools and software updates.

1. Understanding the Mercedes Benz DTC P1570 Code

Mercedes Benz DTC P1570 signifies an issue within the Drive Authorization System (DAS), preventing the engine from starting. This section dives into the intricacies of this code, covering its definition, symptoms, and potential impact on vehicle operation.

1.1. What Does Mercedes Benz DTC P1570 Mean?

Mercedes Benz DTC P1570 indicates “DAS (Drive Authorization System) faulty signal.” The DAS is an anti-theft system that verifies the key’s authorization to start the vehicle. When the DAS detects a discrepancy or malfunction, it triggers the P1570 code and immobilizes the engine to prevent unauthorized use. This fault means the Engine Control Unit (ECU) is not receiving the correct signal from the DAS, which can stem from various issues ranging from a faulty key to a malfunctioning DAS module.

1.2. Common Symptoms Associated with the P1570 Code

When the P1570 code is triggered, several symptoms may manifest, including:

• Engine Immobilization: The most prominent symptom is the engine failing to start. The starter may crank, but the engine won’t ignite.
• Intermittent Starting Issues: The car might start sometimes but fail to start at other times.
• DAS Warning Light: The DAS warning light on the dashboard may illuminate.
• Central Locking Problems: Issues with the central locking system, such as doors not locking or unlocking properly.
• Alarm System Malfunctions: The alarm system may become erratic or fail to disarm correctly.
• Reduced Engine Performance: In some cases, if the engine does start, it may exhibit reduced power or run in a limited mode.

1.3. Potential Impact on Vehicle Operation

The P1570 code can significantly impact vehicle operation:

• Vehicle Immobilization: The primary impact is the vehicle becoming unusable, as the engine won’t start.
• Inconvenience: Intermittent starting issues can lead to unpredictable vehicle behavior, causing inconvenience and potential safety concerns.
• Security Risks: A malfunctioning DAS can compromise the vehicle’s security, potentially making it vulnerable to theft.
• Diagnostic Challenges: Identifying the root cause of the P1570 code can be complex, requiring specialized diagnostic tools and expertise. AutoExplain.com provides remote diagnostic services to help pinpoint the exact problem.
• Increased Repair Costs: Replacing or repairing DAS components can be expensive, especially if the issue requires dealer-specific programming. AutoExplain.com offers cost-effective remote programming solutions to minimize these costs.

2. Root Causes of Mercedes Benz DTC P1570

Several factors can trigger the Mercedes Benz DTC P1570 code. Understanding these root causes is crucial for accurate diagnosis and effective repair.

2.1. Faulty Key or Transponder

A damaged or improperly programmed key is a common cause of the P1570 code. The key’s transponder chip must communicate correctly with the DAS module for the engine to start.

• Damaged Transponder Chip: The transponder chip inside the key can become damaged due to physical impact, exposure to extreme temperatures, or battery failure.
• Incorrect Programming: If the key hasn’t been correctly programmed to the vehicle’s DAS, it won’t be recognized, triggering the P1570 code.
• Weak Key Battery: A weak or dead battery in the key fob can prevent the transponder from sending the correct signal to the DAS module.

2.2. Malfunctioning DAS (Drive Authorization System) Module

The DAS module itself can fail due to electrical issues, internal component failures, or software corruption.

• Electrical Problems: Voltage spikes, short circuits, or wiring issues can damage the DAS module.
• Component Failure: Internal components such as microchips or relays can fail over time, leading to DAS malfunction.
• Software Corruption: Corrupted or outdated software in the DAS module can cause communication problems with the ECU.
• CAN Bus Communication Issues: Problems with the Controller Area Network (CAN) bus can disrupt communication between the DAS module and other vehicle systems.

2.3. Wiring and Connection Issues

Faulty wiring or loose connections in the DAS circuit can also trigger the P1570 code.

• Loose Connections: Loose or corroded connectors can disrupt the flow of signals between the DAS module, key transponder, and ECU.
• Damaged Wiring: Damaged or frayed wires can cause intermittent or complete signal loss.
• Grounding Issues: Poor grounding can lead to voltage fluctuations and communication errors within the DAS.

2.4. ECU (Engine Control Unit) Problems

Although less common, issues with the ECU can sometimes cause the P1570 code.

• Communication Errors: The ECU may fail to communicate correctly with the DAS module, leading to authorization errors.
• Software Issues: Outdated or corrupted software in the ECU can cause compatibility problems with the DAS.
• Internal Failures: Internal component failures in the ECU can disrupt its ability to process the DAS signal correctly.

2.5. Fuse and Relay Problems

Blown fuses or faulty relays in the DAS circuit can prevent the system from functioning correctly.

• Blown Fuses: A blown fuse can interrupt power to the DAS module, preventing it from operating.
• Faulty Relays: A malfunctioning relay can prevent the DAS module from receiving the necessary signals to authorize engine start.

3. Step-by-Step Diagnostic Procedures for P1570

Diagnosing the Mercedes Benz DTC P1570 requires a systematic approach to pinpoint the root cause. Here’s a step-by-step guide to help you through the process.

3.1. Initial Inspection and Verification

Begin with a thorough visual inspection and basic checks to identify obvious issues.

• Check the Key: Ensure the key is not damaged and the battery is functional. Try a spare key if available.
• Inspect Fuses: Check all fuses related to the DAS and ECU for any signs of damage or blowing.
• Examine Wiring: Look for any visible damage to the wiring harness, connectors, and ground connections.
• Scan for Additional Codes: Use an OBD-II scanner to check for other related trouble codes that might provide additional clues.

3.2. Using a Diagnostic Scanner

A diagnostic scanner is essential for retrieving detailed information about the P1570 code and performing system tests.

• Retrieve and Document Codes: Connect the scanner to the OBD-II port and retrieve all stored trouble codes. Document the codes for future reference.
• Clear the P1570 Code: Clear the P1570 code and attempt to start the engine. See if the code returns immediately or after some time.
• Perform System Tests: Use the scanner to perform system tests on the DAS module, ECU, and related components. This can help identify communication issues or component failures.
• Check Live Data: Monitor live data streams from the DAS and ECU to see if the key transponder signal is being received and processed correctly.

3.3. Testing the Key and Transponder

Verify the functionality of the key and transponder to rule out issues with the key itself.

• Visual Inspection: Check the key for any signs of physical damage, such as cracks or broken components.
• Key Battery Test: Test the key battery voltage to ensure it is within the specified range. Replace the battery if necessary.
• Transponder Test: Use a key programmer or transponder tester to verify the transponder is transmitting a signal and that the signal is being received by the DAS module.

3.4. Evaluating the DAS Module

Assess the DAS module for proper function and communication with other vehicle systems.

• Check Power and Ground: Verify the DAS module is receiving proper power and ground signals. Use a multimeter to check voltage and ground continuity.
• Communication Test: Use a diagnostic scanner to check for communication with the DAS module. If the scanner cannot communicate with the module, it may indicate a module failure or wiring issue.
• Module Replacement: If the DAS module is suspected of being faulty, consider replacing it with a new or refurbished unit. Note that the new module will need to be programmed to the vehicle. AutoExplain.com provides remote programming services for DAS modules.

3.5. Examining Wiring and Connections

Thoroughly inspect the wiring and connections associated with the DAS.

• Continuity Testing: Use a multimeter to perform continuity tests on the wiring between the DAS module, key transponder, and ECU. Look for any open circuits or shorts.
• Voltage Drop Testing: Perform voltage drop tests on the power and ground circuits to identify excessive resistance that could be affecting the DAS module’s performance.
• Connector Inspection: Check all connectors for corrosion, loose pins, or damage. Clean or replace connectors as necessary.

3.6. Checking the ECU

Assess the ECU for communication and software issues.

• Communication Test: Use a diagnostic scanner to verify communication with the ECU.
• Software Update: Check for any available software updates for the ECU. Outdated software can sometimes cause communication issues with the DAS module. AutoExplain.com offers ECU programming and software update services.
• ECU Replacement: If the ECU is suspected of being faulty, consider replacing it with a new or refurbished unit. The new ECU will need to be programmed to the vehicle.

3.7. Verifying Fuses and Relays

Check all fuses and relays related to the DAS and ECU.

• Fuse Testing: Use a multimeter to test each fuse for continuity. Replace any blown fuses with the correct amperage rating.
• Relay Testing: Test the relays using a multimeter or relay tester to ensure they are functioning correctly. Replace any faulty relays.

4. Solutions for Resolving Mercedes Benz DTC P1570

Once the root cause of the P1570 code is identified, the appropriate solution can be implemented. Here are several potential solutions, ranging from simple fixes to more complex repairs.

4.1. Key Replacement or Reprogramming

If the key is identified as the problem, replacing or reprogramming it may be necessary.

• Key Replacement: If the key is physically damaged or the transponder is faulty, replacing the key is often the best solution. Obtain a new key from a certified Mercedes-Benz dealer or a reputable locksmith.
• Key Reprogramming: If the key is not correctly programmed to the vehicle, reprogramming it may resolve the issue. This typically requires specialized programming tools and software. AutoExplain.com provides remote key programming services.

4.2. DAS Module Repair or Replacement

If the DAS module is faulty, repairing or replacing it may be required.

• DAS Module Repair: In some cases, the DAS module can be repaired by replacing faulty components or resoldering damaged connections. This should only be attempted by experienced technicians.
• DAS Module Replacement: If the DAS module is beyond repair, replacing it is necessary. Obtain a new or refurbished DAS module and have it programmed to the vehicle. AutoExplain.com offers remote programming services for DAS modules.

4.3. Wiring and Connector Repair

Addressing wiring and connector issues can resolve communication problems within the DAS.

• Wiring Repair: Repair any damaged or frayed wires by splicing in new sections of wire and insulating the connections.
• Connector Replacement: Replace corroded or damaged connectors with new ones. Ensure the new connectors are properly crimped and secured.
• Grounding Improvement: Clean and tighten ground connections to ensure proper grounding for the DAS module and related components.

4.4. ECU Repair or Replacement

If the ECU is causing the P1570 code, repairing or replacing it may be necessary.

• ECU Repair: In some cases, the ECU can be repaired by replacing faulty components or resoldering damaged connections. This should only be attempted by experienced technicians.
• ECU Replacement: If the ECU is beyond repair, replacing it is necessary. Obtain a new or refurbished ECU and have it programmed to the vehicle. AutoExplain.com offers ECU programming services.

4.5. Fuse and Relay Replacement

Replacing blown fuses or faulty relays can restore power and functionality to the DAS.

• Fuse Replacement: Replace any blown fuses with new fuses of the correct amperage rating.
• Relay Replacement: Replace any faulty relays with new relays that meet the vehicle’s specifications.

4.6. Professional Diagnostic and Repair Services

For complex issues or if you’re unsure how to proceed, seeking professional diagnostic and repair services is recommended.

• Certified Technicians: Consult with certified Mercedes-Benz technicians who have experience diagnosing and repairing DAS-related issues.
• Specialized Equipment: Ensure the repair shop has the necessary diagnostic equipment and tools to accurately diagnose and repair the P1570 code.
• Remote Support: AutoExplain.com offers remote diagnostic and programming services to assist technicians in resolving complex DAS issues.

5. Preventive Measures to Avoid P1570 Code

Taking preventive measures can help reduce the likelihood of encountering the P1570 code and other DAS-related issues.

5.1. Regular Key Maintenance

Properly maintaining the key can prevent damage and ensure reliable communication with the DAS.

• Protect the Key: Avoid exposing the key to extreme temperatures, moisture, or physical impact.
• Replace the Battery: Replace the key battery regularly to ensure the transponder has sufficient power to transmit its signal.
• Use a Key Fob: Use a protective key fob to prevent damage to the key and transponder.

5.2. Proper Vehicle Maintenance

Regular vehicle maintenance can help prevent electrical issues that can affect the DAS.

• Battery Maintenance: Keep the vehicle’s battery in good condition by regularly checking its voltage and cleaning the terminals.
• Wiring Inspection: Periodically inspect the wiring harness for any signs of damage or corrosion.
• Fuse Replacement: Replace any worn or corroded fuses to ensure proper electrical flow.

5.3. Software Updates

Keeping the vehicle’s software up to date can prevent compatibility issues between the DAS and other systems.

• ECU Updates: Check for and install any available software updates for the ECU.
• DAS Updates: Check for and install any available software updates for the DAS module. AutoExplain.com offers remote software update services.

5.4. Professional Inspections

Regular professional inspections can identify potential issues before they lead to the P1570 code.

• Annual Inspections: Schedule annual inspections with a certified Mercedes-Benz technician to check the DAS and related systems.
• Diagnostic Scans: Perform regular diagnostic scans to identify any potential trouble codes or communication issues.

6. How Can AutoExplain.com Help?

AutoExplain.com offers a range of services to assist with diagnosing and resolving the Mercedes Benz DTC P1570 code.

6.1. Remote Diagnostic Support

Our experienced technicians can provide remote diagnostic support to help you pinpoint the root cause of the P1570 code.

• Real-Time Assistance: Receive real-time guidance from our technicians via WhatsApp or email.
  • WhatsApp: (+84)967469410
  • Email: [email protected]
• Expert Analysis: Benefit from our technicians’ expertise in diagnosing complex DAS issues.
• Step-by-Step Instructions: Receive detailed step-by-step instructions to guide you through the diagnostic process.

6.2. ECU and DAS Programming

We offer remote ECU and DAS programming services to ensure proper system function.

• ECU Programming: Our technicians can remotely program the ECU to ensure it is correctly communicating with the DAS module.
• DAS Programming: We can remotely program the DAS module to recognize the key transponder and authorize engine start.
• Module Updates: We provide software updates for the ECU and DAS module to address any compatibility issues.

6.3. Key Programming Services

AutoExplain.com provides remote key programming services to replace or reprogram keys.

• Key Replacement: If you need a replacement key, we can remotely program it to your vehicle.
• Key Reprogramming: If your key is not working correctly, we can remotely reprogram it to ensure it is properly recognized by the DAS.

6.4. Expert Consultation

Our team of experts is available to provide consultation and guidance on DAS-related issues.

• Technical Support: Receive technical support from our experienced technicians.
• Troubleshooting Advice: Get expert advice on troubleshooting complex DAS problems.
• Best Practices: Learn best practices for maintaining and repairing the DAS to prevent future issues.

Contact AutoExplain.com today via WhatsApp at (+84)967469410 or email at [email protected] for reliable and efficient remote diagnostic and programming services. Our office is located at 1500 N Grant ST Sten Denver, CO 80203. Visit our website at AutoExplain.com for more information.

7. Real-World Case Studies

Examining real-world case studies can provide valuable insights into diagnosing and resolving the P1570 code.

7.1. Case Study 1: Faulty Key Transponder

• Vehicle: 2015 Mercedes-Benz C300
• Symptoms: Engine would crank but not start, P1570 code present.
• Diagnosis: Initial inspection revealed no visible damage to the key. Diagnostic scanner showed a weak transponder signal.
• Solution: Replaced the key with a new, correctly programmed key. The vehicle started immediately.
• Key Takeaway: A weak or faulty key transponder is a common cause of the P1570 code.

7.2. Case Study 2: Corroded Wiring Harness

• Vehicle: 2012 Mercedes-Benz E350
• Symptoms: Intermittent starting issues, P1570 code present.
• Diagnosis: Visual inspection revealed corrosion in the wiring harness near the DAS module.
• Solution: Repaired the corroded wiring harness by replacing damaged wires and connectors. The vehicle started reliably.
• Key Takeaway: Corroded wiring can disrupt communication between the DAS module and other systems, leading to the P1570 code.

7.3. Case Study 3: DAS Module Failure

• Vehicle: 2017 Mercedes-Benz GLC300
• Symptoms: Engine would not start, P1570 code present, no communication with the DAS module.
• Diagnosis: Diagnostic scanner could not communicate with the DAS module. Power and ground to the module were confirmed.
• Solution: Replaced the DAS module and programmed it to the vehicle using AutoExplain.com’s remote programming service. The vehicle started immediately.
• Key Takeaway: A faulty DAS module can prevent engine start and trigger the P1570 code.

7.4. Case Study 4: ECU Software Issue

• Vehicle: 2014 Mercedes-Benz S550
• Symptoms: Engine would crank but not start, P1570 code present.
• Diagnosis: Diagnostic scanner showed a communication error between the ECU and DAS module.
• Solution: Updated the ECU software to the latest version using AutoExplain.com’s remote programming service. The vehicle started reliably.
• Key Takeaway: Outdated ECU software can cause communication issues with the DAS module, leading to the P1570 code.

These case studies demonstrate the importance of thorough diagnostics and the value of expert support in resolving the P1570 code.

8. Understanding Related Diagnostic Trouble Codes (DTCs)

When diagnosing the Mercedes Benz DTC P1570, it’s beneficial to understand related DTCs that may provide additional insights into the issue. Here are some common DTCs associated with the DAS and anti-theft systems:

8.1. P1571 – Drive Authorization System Incorrect Signal

This code indicates that the signal received by the engine control unit (ECU) from the drive authorization system (DAS) is incorrect or invalid. This can result from a faulty key transponder, a malfunctioning DAS module, or wiring issues.

Possible Causes:

• Faulty key transponder
• Malfunctioning DAS module
• Wiring or connection issues in the DAS circuit
• ECU communication problems

8.2. P1572 – Drive Authorization System Signal Implausible

This code indicates that the signal being sent between the DAS and the engine control unit (ECU) is inconsistent or implausible, suggesting a potential data mismatch or corruption.

Possible Causes:

• Software incompatibility between the DAS and ECU
• Corrupted data in the DAS module or ECU
• CAN bus communication issues
• Faulty DAS module or ECU

8.3. B1000 – Control Unit Faulty

This generic code often points to a more serious underlying issue with the ECU or DAS module itself, such as internal hardware failures or software corruption.

Possible Causes:

• Internal component failure in the DAS module or ECU
• Software corruption
• Electrical damage to the control unit
• Overheating or physical damage

8.4. P0600 – Serial Communication Link Malfunction

This code indicates a general issue with the serial communication link, typically related to the CAN bus network, which is crucial for the DAS module to communicate with other systems.

Possible Causes:

• CAN bus wiring issues (shorts, opens, or corrosion)
• Faulty CAN bus module
• ECU or DAS module communication problems
• Interference from aftermarket devices

8.5. P0610 – Control Module Vehicle Options Error

This code indicates that there’s a mismatch or error in the vehicle’s option settings stored in the control module, which can impact the way the DAS interacts with other systems.

Possible Causes:

• Incorrectly configured vehicle options in the DAS module
• Software incompatibility
• ECU or DAS module programming issues
• Data corruption

8.6. B1001 – Stored Fault in Control Unit

This code is a generic indicator of a stored fault within a control unit, such as the DAS module or ECU, which may require further investigation to identify the specific underlying issue.

Possible Causes:

• Historical fault codes stored in the DAS module or ECU
• Intermittent electrical issues
• Software glitches
• Sensor or component failures

8.7. B1004 – Component Faulty

This code typically means that a specific component within the DAS or related systems has failed or is not functioning as expected. Further diagnostic steps are needed to pinpoint the exact component.

Possible Causes:

• Faulty relay
• Defective sensor
• Wiring issues
• DAS module internal component failure

By understanding these related DTCs and their potential causes, technicians can perform more comprehensive diagnostics and identify the root cause of the P1570 code more effectively.

9. Frequently Asked Questions (FAQ)

Here are some frequently asked questions about the Mercedes Benz DTC P1570 code.

9.1. What does the Mercedes Benz DTC P1570 code mean?

The Mercedes Benz DTC P1570 code indicates “DAS (Drive Authorization System) faulty signal,” meaning the engine control unit (ECU) is not receiving the correct signal from the DAS, preventing the engine from starting.

9.2. Can I drive my car with the P1570 code?

No, the P1570 code typically prevents the engine from starting, making the vehicle undrivable.

9.3. How do I fix the P1570 code?

Fixing the P1570 code requires diagnosing the root cause, which could involve replacing or reprogramming the key, repairing or replacing the DAS module, fixing wiring issues, or addressing ECU problems. AutoExplain.com offers remote diagnostic and programming services to assist with these repairs.

9.4. How much does it cost to fix the P1570 code?

The cost to fix the P1570 code can vary depending on the cause and the necessary repairs. Key replacement or reprogramming can range from $200 to $500, while DAS module replacement can cost between $600 and $1500. AutoExplain.com offers cost-effective remote programming solutions to minimize these expenses.

9.5. Can a low battery cause the P1570 code?

Yes, a low battery in the key fob can prevent the transponder from sending the correct signal to the DAS module, triggering the P1570 code.

9.6. Do I need to reprogram the DAS module after replacing the battery?

In most cases, you do not need to reprogram the DAS module after replacing the vehicle’s battery, but it’s recommended to check the battery health and voltage to ensure it meets the vehicle’s specifications.

9.7. Can I program a new key myself?

Programming a new key typically requires specialized tools and software. AutoExplain.com offers remote key programming services to assist you with this process.

9.8. What tools are needed to diagnose the P1570 code?

Diagnosing the P1570 code requires a diagnostic scanner, multimeter, key programmer (optional), and wiring diagrams.

9.9. How can AutoExplain.com help me with the P1570 code?

AutoExplain.com offers remote diagnostic support, ECU and DAS programming, and key programming services to help you diagnose and resolve the P1570 code. Contact us via WhatsApp at (+84)967469410 or email at [email protected] for assistance.

9.10. Where can I find more information about the P1570 code?

You can find more information about the P1570 code on automotive forums, technical websites, and Mercedes-Benz repair manuals. AutoExplain.com also provides expert consultation and technical support.

By addressing these common questions, technicians can gain a better understanding of the P1570 code and how to effectively resolve it.