P031B

Generic code

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iWhat P031B means

Ignition C Control Signal Circuit Low

!Possible symptoms

Check for loose or damaged ignition control module connections.
Inspect and replace ignition control module if necessary.
Test and replace ignition coil, if found to be faulty.
Check and replace spark plugs, if worn out or damaged.
Verify and repair any wiring issues in the ignition control signal circuit.

?Possible causes

Malfunctioning ignition control module or ignition coil
Faulty ignition switch or key cylinder
Defective ignition control unit or PCM
Loose or damaged wiring in the ignition control circuit
Faulty engine control module (ECM)

✓Possible solutions

Engine misfire or rough idle
Difficulty starting the vehicle
Decreased fuel efficiency
Engine stalls or shuts off while driving
Increased emissions levels

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P031B on OBD DashX

Real-world causes, how often this code shows up, and the fix — step by step.

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