P0691 Code: ECM/PCM Power Relay Circuit (P0691)
CodePage.genericDisclaimer
Bu ne anlama geliyor?
Code P0691 indicates a problem with the ECM/PCM power relay circuit.
Diagnostic system: Control module, power, and communication
On a Tesla Model-y, the P0691 code should be diagnosed as part of the control module, power, and communication group. Related codes and live data from this same system can change the repair priority, so avoid replacing parts from the code name alone.
Most Common Causes for Tesla Model-y
- Dahili PCM/ECM arızası
- Hasarlı, aşınmış veya kopuk kablo tesisatı
- Zayıf veya arızalı akü
- Korozyona uğramış veya gevşek elektrik konnektörü
Dikkat Edilmesi Gereken Belirtiler
- Motor Arıza Lambası yanar
- Motor döner ama çalışmaz
- Motor beklenmedik şekilde stop eder
- Araç düşük güç / acil moduna girer
CodePage.beforeReplacing
- Check battery health, charging voltage, fuses, grounds, and module connectors.
- Look for network communication codes and multiple-module failures.
- Confirm power and ground before suspecting a failed PCM/ECM/TCM.
- Check for blown fuses, weak battery voltage, and damaged connectors before buying major parts.
Nasıl Teşhis Edilir
CodePage.commonMistakes
Replacing a control module before checking voltage supply, grounds, fuses, water intrusion, and connector condition. Always confirm the fault with freeze-frame data, live data, visual inspection, and circuit checks before spending money on parts.
CodePage.faq
Can I drive with the P0691 code?
If the check engine light is solid, you can usually drive to a safe location or mechanic. If the light is flashing, pull over immediately to prevent catastrophic engine or catalytic converter damage.
Will the P0691 code clear itself?
Once the underlying problem is fixed, the engine computer will run its self-checks. If it passes over several drive cycles, the light will turn off automatically. You can also clear it immediately using an OBD2 scanner.
Will this code fail an emissions test?
Yes. If the Check Engine Light is on due to the P0691 code, your Tesla will automatically fail an OBD2 plug-in emissions or smog test.
What should I check first for P0691?
Check battery health, charging voltage, fuses, grounds, and module connectors. Look for network communication codes and multiple-module failures. Confirm power and ground before suspecting a failed PCM/ECM/TCM.
Join the Discussion
Tahmini Tamir Maliyeti
Fuse, connector, wiring, cleaning, or basic inspection
Control module replacement and programming after power/ground verification
Parça ve işçilik dahildir. Konuma göre değişebilir.
Power and ground repairs are often cheaper than module replacement, which may also require programming.
Tamir Zorluğu
Can usually be performed at home with basic hand tools.