P1245 Possible Causes
- Faulty alternator/generator
- Broken alternator belt
- Alternator/generator wiring harness is open or shorted
- Poor electrical connection in the alternator/generator circuit
- Damaged Powertrain Control Module (PCM)
How is code P1245 repaired?
Start by checking the “Possible Causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Check Engine Light on (or Service Engine Soon warning light)
P1245 Meaning
The Powertrain Control Module (PCM) monitors the generator load from the generator/regulator as a frequency. The fault indicates that the input is lower than what the load should be during normal operation. The load input may be low when no generator output exists.