P031B
Ignition C Control Signal Circuit Low
P031B is an OBD-II diagnostic trouble code meaning: Ignition C Control Signal Circuit Low. Common causes: open or short circuit in the ignition coil control circuit, ignition coil malfunction. Estimated repair cost: $56–167.
Symptoms
- Misfire in cylinder C
- Unstable engine operation
- Power reduction
- Increased fuel consumption
- Check Engine Light Illuminates
Causes
- Open or short circuit in the ignition coil control circuit
- Ignition coil malfunction
- Wiring harness damage
- ECU malfunction
- Poor contact in control circuit connectors
How to Fix
- Check the integrity of the ignition coil control circuit
- Check the condition of the ignition coil
- Inspect the wiring harness for damage
- Check the contacts in the control circuit connectors
- If necessary, replace the ignition coil or wiring harness
- Check the operation of the computer
Related codes
Error P031B by Vehicle Brand
FAQ
What does the P031B code mean?
P031B is an OBD-II diagnostic trouble code that indicates: Ignition C Control Signal Circuit Low
What causes a P031B error code?
The most common causes of P031B include: Open or short circuit in the ignition coil control circuit; Ignition coil malfunction; Wiring harness damage; ECU malfunction.
How do I fix a P031B diagnostic trouble code?
To fix P031B: Check the integrity of the ignition coil control circuit. Check the condition of the ignition coil. Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P031B?
Limited driving only, diagnose soon
How much does it cost to fix P031B?
The estimated repair cost for P031B is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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