Understanding OBD2 Code P1564: Throttle Actuator Control Module Throttle Position Sensor Agreement

The OBD2 code P1564, indicating a Throttle Actuator Control Module Throttle Position Sensor Agreement fault, can be a frustrating issue for car owners. This article provides a comprehensive guide to understanding, diagnosing, and resolving this trouble code, helping you get back on the road quickly and safely.

The P1564 code signals a disagreement between the throttle position sensor (TPS) readings within the Throttle Actuator Control Module (TACM). This discrepancy can lead to performance issues, including limp mode, rough idling, and even stalling. Understanding the root cause is crucial for effective repair.

What Does the P1564 Code Mean?

The P1564 code specifically points to an internal issue within the TACM. The module uses two internal throttle position sensors to monitor the throttle plate’s position. When these two sensors provide significantly different readings, the P1564 code is triggered. This indicates a potential fault within the TACM itself, rather than the TPS located on the throttle body.

This is different from codes related to the external TPS, which usually involve wiring issues or sensor malfunction. The P1564 code directly implicates the TACM, requiring a different diagnostic and repair approach.

Diagnosing the P1564 Code

Diagnosing the P1564 code involves a systematic approach to pinpoint the problem. While the code itself points to the TACM, it’s important to rule out other potential issues before replacing the module.

• Check for Other Codes: Use an OBD2 scanner to check for any other codes stored alongside P1564. These additional codes can provide valuable clues and context.
• Inspect Wiring and Connectors: Although less likely with P1564, inspect the wiring and connectors associated with the TACM for any damage, corrosion, or loose connections.
• Test the TACM: Specialized diagnostic tools may be required to test the TACM’s functionality directly. This often involves checking the voltage signals from the internal TPS sensors.

OBD2 Scanner Checking P1564 Code

“A proper diagnosis is paramount when dealing with P1564,” says automotive expert, John Miller, ASE Certified Master Technician. “Jumping to conclusions can lead to unnecessary part replacements and wasted time.”

How to Fix the P1564 Code

Once you’ve confirmed the TACM is the culprit, the most common solution is replacement. However, it’s crucial to ensure the replacement TACM is compatible with your specific vehicle make and model.

• Replace the TACM: This usually involves disconnecting the battery, removing the old TACM, and installing the new one.
• Perform a Relearn Procedure: After replacing the TACM, a relearn procedure may be necessary. This allows the new module to adapt to your vehicle’s specific parameters. Consult your vehicle’s service manual for the correct procedure.
• Clear the Code: After the repair, use an OBD2 scanner to clear the P1564 code and any other related codes.

“Replacing the TACM is often the most effective solution for P1564,” adds Miller. “However, ensuring proper installation and relearning procedures are crucial for optimal performance.”

Conclusion

The OBD2 code P1564 can be a complex issue, but understanding its meaning and following a systematic diagnostic approach can simplify the repair process. While replacing the TACM is often the necessary fix, remember to check for other related codes and inspect wiring before jumping to conclusions. Addressing this issue promptly will restore your vehicle’s performance and prevent further complications. Remember to consult your vehicle’s service manual or a qualified mechanic for specific instructions and guidance.

FAQ

1. What is the P1564 code? The P1564 code indicates a Throttle Actuator Control Module Throttle Position Sensor Agreement fault.
2. What causes the P1564 code? A malfunction within the TACM itself, specifically a disagreement between its internal throttle position sensors.
3. Can I drive with the P1564 code? It’s not recommended to drive extensively with this code as it can lead to performance issues and potential safety hazards.
4. How do I fix the P1564 code? The most common fix is to replace the TACM.
5. Is the P1564 code related to the external TPS? No, it’s related to the internal sensors within the TACM.
6. What is a TACM relearn procedure? A process to calibrate the new TACM to your vehicle’s specific settings.
7. Where can I find more information about my specific vehicle’s TACM? Consult your vehicle’s service manual or a qualified mechanic.

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