What Does P02F8 Mean?
The ECM has detected that the Cylinder 11 fuel injector circuit is operating outside the expected electrical range or performance parameters. Applicable to V12 engines, the injector's electrical characteristics for Cylinder 11 deviate from the calibrated specification, indicating degradation of the injector or an issue with its driver circuit.
Common Causes
35%
Degraded Cylinder 11 fuel injector with shifted coil resistance or slow mechanical response
25%
Corroded or high-resistance wiring connections in the Cylinder 11 injector circuit
20%
ECM injector driver circuit fault on the Cylinder 11 output channel
20%
Wrong specification replacement injector in Cylinder 11
Diagnostic Steps
1
Step 1: Measure Cylinder 11 injector coil resistance and compare to specification and the complete injector set. V12 engines require matched injector sets for smooth operation.
2
Step 2: Capture the injector current waveform on Cylinder 11 with an oscilloscope and compare to adjacent cylinder waveforms on the same bank.
3
Step 3: Inspect the Cylinder 11 injector connector for corrosion, heat damage, and proper engagement. On V12 engines, access to rear cylinders is often very limited.
4
Step 4: Swap the Cylinder 11 injector with another cylinder on the same bank if access permits. Clear codes and retest to isolate the fault.
5
Step 5: Verify the correct injector specification and any required individual injector coding for Cylinder 11.
Estimated Repair Cost
$250 - $900
Parts + labor, varies by vehicle and location
The ECM has detected that the Cylinder 11 fuel injector circuit is operating outside the expected electrical range or performance parameters. Applicable to V12 engines, the injector's electrical characteristics for Cylinder 11 deviate from the calibrated specification, indicating degradation of the ...
The most common cause of P02F8 (Cylinder 11 Injector Circuit Range/Performance) is: Degraded Cylinder 11 fuel injector with shifted coil resistance or slow mechanical response
Typical repair costs for P02F8 range from $250 to $900, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Injector circuit performance issues on Cylinder 11 cause imprecise fueling and misfire risk on V12 engines. Due to the engine complexity, proper diagnosis is essential to avoid unnecessary part replacement.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P02F8 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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