P1AA7
Starter/Generator Field Coil Circuit
P1AA7 is an OBD-II diagnostic trouble code meaning: Starter/Generator Field Coil Circuit. Common causes: open or short circuit in the winding circuit, failure of the starter-generator itself. Estimated repair cost: $56–278.
Symptoms
- Problems starting the engine
- Check Engine Light Is On
- Reduced hybrid system efficiency
- Possible strange noises from the starter-generator area
- Unstable operation of the stop-start system
Causes
- Open or short circuit in the winding circuit
- Failure of the starter-generator itself
- Wiring Harness Problems
- Control module malfunction
- Corrosion of contacts or connections
How to Fix
- Check the integrity of the wiring harness to the starter-generator
- Winding resistance testing
- Checking contacts and connections for corrosion
- Control module diagnostics
- If necessary, replace the starter-generator
Related codes
FAQ
What does the P1AA7 code mean?
P1AA7 is an OBD-II diagnostic trouble code that indicates: Starter/Generator Field Coil Circuit
What causes a P1AA7 error code?
The most common causes of P1AA7 include: Open or short circuit in the winding circuit; Failure of the starter-generator itself; Wiring Harness Problems; Control module malfunction.
How do I fix a P1AA7 diagnostic trouble code?
To fix P1AA7: Check the integrity of the wiring harness to the starter-generator. Winding resistance testing. Checking contacts and connections for corrosion. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1AA7?
Yes, but get it checked soon
How much does it cost to fix P1AA7?
The estimated repair cost for P1AA7 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat