P25B9
Auxiliary Ignition Switch On/Start Position Circuit High
P25B9 is an OBD-II diagnostic trouble code meaning: Auxiliary Ignition Switch On/Start Position Circuit High. Common causes: short circuit to positive in the circuit, ignition relay malfunction. Estimated repair cost: $17–56.
Symptoms
- Difficulty starting the engine
- engine stalls after starting
- blinking lights on the dashboard
- unstable operation of the ignition system
Causes
- short circuit to positive in the circuit
- ignition relay malfunction
- wiring harness damage
- poor contact in connectors
- ignition switch malfunction
How to Fix
- Check the voltage in the ignition circuit
- Inspect relays and fuses
- Check the condition of the wiring harness
- Test the ignition switch
- Replace damaged components
Related codes
Error P25B9 by Vehicle Brand
FAQ
What does the P25B9 code mean?
P25B9 is an OBD-II diagnostic trouble code that indicates: Auxiliary Ignition Switch On/Start Position Circuit High
What causes a P25B9 error code?
The most common causes of P25B9 include: short circuit to positive in the circuit; ignition relay malfunction; wiring harness damage; poor contact in connectors.
How do I fix a P25B9 diagnostic trouble code?
To fix P25B9: Check the voltage in the ignition circuit. Inspect relays and fuses. Check the condition of the wiring harness. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P25B9?
Yes, but get it checked soon
How much does it cost to fix P25B9?
The estimated repair cost for P25B9 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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