P1A91
14 Volt Power Module Temperature Sensor 1 Circuit Low Voltage
P1A91 is an OBD-II diagnostic trouble code meaning: 14 Volt Power Module Temperature Sensor 1 Circuit Low Voltage. Common causes: power module temperature sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $17–89.
Symptoms
- Check Engine light comes on
- Possible reduction in electrical system power
- Errors in the charging system
- Power module overheating
- Unstable operation of electrical equipment
Causes
- Power module temperature sensor malfunction
- Open or short circuit in the sensor circuit
- Poor contact in connectors
- 14V power module faulty
- Wiring or grounding problems
How to Fix
- Check the continuity of the temperature sensor circuit
- Inspect connectors and contacts for oxidation or damage
- Check the functionality of the temperature sensor
- Test the 14V power module
- If necessary, replace the sensor or power module
Related codes
FAQ
What does the P1A91 code mean?
P1A91 is an OBD-II diagnostic trouble code that indicates: 14 Volt Power Module Temperature Sensor 1 Circuit Low Voltage
What causes a P1A91 error code?
The most common causes of P1A91 include: Power module temperature sensor malfunction; Open or short circuit in the sensor circuit; Poor contact in connectors; 14V power module faulty.
How do I fix a P1A91 diagnostic trouble code?
To fix P1A91: Check the continuity of the temperature sensor circuit. Inspect connectors and contacts for oxidation or damage. Check the functionality of the temperature sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1A91?
Yes, but get it checked soon
How much does it cost to fix P1A91?
The estimated repair cost for P1A91 is $17–89. Actual cost depends on your vehicle, location, and labor rates.
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