What Does P02F6 Mean?
The ECM has detected that the Cylinder 9 fuel injector circuit is operating outside the expected electrical range or performance parameters. Applicable to V10 and V12 engines, the injector's electrical response does not match calibrated values, indicating degradation in the injector or its circuit components.
Common Causes
35%
Degraded Cylinder 9 fuel injector with shifted coil impedance or mechanical response deterioration
25%
Corroded or damaged wiring in the Cylinder 9 injector circuit
20%
ECM injector driver circuit malfunction on the Cylinder 9 output
20%
Wrong specification injector installed in Cylinder 9 position
Diagnostic Steps
1
Step 1: Measure Cylinder 9 injector coil resistance and compare to specification and other cylinders. On V10 engines, rear cylinders are particularly heat-stressed.
2
Step 2: Capture the injector current waveform on Cylinder 9 using an oscilloscope with current probe. Analyze for peak current, response time, and hold current anomalies.
3
Step 3: Inspect the Cylinder 9 injector connector for corrosion, heat damage, and proper terminal engagement.
4
Step 4: Swap the Cylinder 9 injector with another cylinder on the same bank, clear codes, and retest to isolate the fault.
5
Step 5: Verify the correct injector specification and calibration programming for Cylinder 9 in the ECM.
Estimated Repair Cost
$200 - $750
Parts + labor, varies by vehicle and location
The ECM has detected that the Cylinder 9 fuel injector circuit is operating outside the expected electrical range or performance parameters. Applicable to V10 and V12 engines, the injector's electrical response does not match calibrated values, indicating degradation in the injector or its circuit c...
The most common cause of P02F6 (Cylinder 9 Injector Circuit Range/Performance) is: Degraded Cylinder 9 fuel injector with shifted coil impedance or mechanical response deterioration
Typical repair costs for P02F6 range from $200 to $750, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Injector circuit performance faults on Cylinder 9 cause imprecise fueling and misfire risk on V10/V12 engines, potentially damaging the catalytic converter.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P02F6 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel Injection System
Difficulty
Type
Generic (SAE)
Recommended Tools
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