P031F
Ignition D Control Signal Circuit High
P031F is an OBD-II diagnostic trouble code meaning: Ignition D Control Signal Circuit High. Common causes: short circuit of the control circuit of coil d to the +12v line, group d ignition coil malfunction. Estimated repair cost: $33–133.
Symptoms
- Misfire in group D cylinders
- Vibration and unstable idle
- Reduced engine power
- Increased fuel consumption
- Check Engine Light Is On or Flashing
Causes
- Short circuit of the control circuit of coil D to the +12V line
- Group D ignition coil malfunction
- Damage to the wiring or oxidation of the connector
- Defective ignition module
- ECU malfunction (rare)
How to Fix
- Read codes, identify group D cylinders according to the engine diagram
- Inspect the wiring and ignition coil connector D
- Measure the resistance of the primary winding of coil D
- Check the control voltage with an oscilloscope or multimeter
- Swap coil D with another group to confirm the fault
- Replace the faulty coil, if necessary, a piece of wiring
Related codes
Error P031F by Vehicle Brand
FAQ
What does the P031F code mean?
P031F is an OBD-II diagnostic trouble code that indicates: Ignition D Control Signal Circuit High
What causes a P031F error code?
The most common causes of P031F include: Short circuit of the control circuit of coil D to the +12V line; Group D ignition coil malfunction; Damage to the wiring or oxidation of the connector; Defective ignition module.
How do I fix a P031F diagnostic trouble code?
To fix P031F: Read codes, identify group D cylinders according to the engine diagram. Inspect the wiring and ignition coil connector D. Measure the resistance of the primary winding of coil D. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P031F?
Do not drive — repair immediately
How much does it cost to fix P031F?
The estimated repair cost for P031F is $33–133. Actual cost depends on your vehicle, location, and labor rates.
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