P1A9B
Starter/Generator Inverter Phase U Temperature Sensor Performance
P1A9B is an OBD-II diagnostic trouble code meaning: Starter/Generator Inverter Phase U Temperature Sensor Performance. Common causes: phase u temperature sensor fault, open or short circuit in the sensor circuit. Estimated repair cost: $17–56.
Symptoms
- Check Engine light comes on
- Problems starting the engine
- Reduced efficiency of the regenerative braking system
- Incorrect operation of the starter/generator
- Inverter overheating
Causes
- Phase U temperature sensor fault
- Open or short circuit in the sensor circuit
- Poor contact in the sensor connector
- Wiring harness damage
- Starter/Generator Inverter Malfunction
How to Fix
- Check phase U temperature sensor
- Check the integrity of the sensor circuit
- Inspect connectors and contacts for corrosion or damage
- Check the operation of the starter/generator inverter
- Replace temperature sensor if necessary
Related codes
FAQ
What does the P1A9B code mean?
P1A9B is an OBD-II diagnostic trouble code that indicates: Starter/Generator Inverter Phase U Temperature Sensor Performance
What causes a P1A9B error code?
The most common causes of P1A9B include: Phase U temperature sensor fault; Open or short circuit in the sensor circuit; Poor contact in the sensor connector; Wiring harness damage.
How do I fix a P1A9B diagnostic trouble code?
To fix P1A9B: Check phase U temperature sensor. Check the integrity of the sensor circuit. Inspect connectors and contacts for corrosion or damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1A9B?
Yes, but get it checked soon
How much does it cost to fix P1A9B?
The estimated repair cost for P1A9B is $17–56. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat