P02F9

Symptoms

• Misfire in cylinder 12
• Unstable idle
• Reduced engine power
• Increased fuel consumption
• Check Engine Light Illuminates

Causes

• Malfunction of the injector of the 12th cylinder
• Open or short circuit in the injector wiring harness
• Poor contact in the injector connector
• ECU malfunction
• Problems with power or grounding of the injector circuit

How to Fix

1. Check the resistance of the injector of the 12th cylinder
2. Inspect the wiring harness and connectors for damage.
3. Check the voltage and continuity of the injector circuit
4. Test the operation of the injector on a stand
5. If necessary, replace the injector or repair the wiring harness
6. Reset the error and check engine operation

Related codes

Error P02F9 by Vehicle Brand