P03FF
Ignition L Control Signal Circuit High
P03FF is an OBD-II diagnostic trouble code meaning: Ignition L Control Signal Circuit High. Common causes: ignition coil malfunction, open or short circuit in wiring harness. Estimated repair cost: $56–167.
Symptoms
- Misfire in a specific cylinder
- Unstable engine idling
- Reduced engine power
- Increased fuel consumption
- Check Engine Light Illuminates
Causes
- Ignition coil malfunction
- Open or short circuit in wiring harness
- Poor contact in the ignition coil connectors
- Engine ECU malfunction
- Control circuit ground problems
How to Fix
- Check the resistance of the ignition coil
- Inspect the wiring harness for damage
- Check connections and connectors of the ignition coil
- Check the integrity of the control circuit using an oscilloscope
- If necessary, replace the ignition coil or repair the wiring harness
- If all elements are in good condition, check the ECU output signal
Related codes
Error P03FF by Vehicle Brand
FAQ
What does the P03FF code mean?
P03FF is an OBD-II diagnostic trouble code that indicates: Ignition L Control Signal Circuit High
What causes a P03FF error code?
The most common causes of P03FF include: Ignition coil malfunction; Open or short circuit in wiring harness; Poor contact in the ignition coil connectors; Engine ECU malfunction.
How do I fix a P03FF diagnostic trouble code?
To fix P03FF: Check the resistance of the ignition coil. Inspect the wiring harness for damage. Check connections and connectors of the ignition coil. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P03FF?
Limited driving only, diagnose soon
How much does it cost to fix P03FF?
The estimated repair cost for P03FF is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat