What Does P02F5 Mean?
The ECM has detected that the Cylinder 8 fuel injector circuit is operating outside the expected electrical range or performance parameters. The injector's current draw, response timing, or voltage characteristics deviate from calibrated values. This applies to V8 engines and indicates degradation in the Cylinder 8 injector or its associated circuit components.
Common Causes
35%
Degraded Cylinder 8 fuel injector with altered coil characteristics from thermal cycling and age
25%
Heat-damaged or corroded wiring connections in the Cylinder 8 injector circuit
20%
ECM injector driver fault on the Cylinder 8 output channel
20%
Incorrect replacement injector installed in Cylinder 8 with wrong impedance or flow specification
Diagnostic Steps
1
Step 1: Measure Cylinder 8 injector coil resistance and compare to manufacturer specification and to the other seven injectors.
2
Step 2: Use an oscilloscope with current clamp to capture the Cylinder 8 injector waveform. Analyze peak current, hold current, and timing relative to other cylinders.
3
Step 3: Inspect the Cylinder 8 injector connector and harness for heat damage. On V8 engines, the rear cylinders experience the most thermal stress on wiring and connectors.
4
Step 4: Swap the Cylinder 8 injector with another cylinder on the same bank, clear codes, and retest to isolate the component from the circuit.
5
Step 5: Verify the correct injector part number and any required individual injector calibration programming.
Estimated Repair Cost
$150 - $700
Parts + labor, varies by vehicle and location
The ECM has detected that the Cylinder 8 fuel injector circuit is operating outside the expected electrical range or performance parameters. The injector's current draw, response timing, or voltage characteristics deviate from calibrated values. This applies to V8 engines and indicates degradation i...
The most common cause of P02F5 (Cylinder 8 Injector Circuit Range/Performance) is: Degraded Cylinder 8 fuel injector with altered coil characteristics from thermal cycling and age
Typical repair costs for P02F5 range from $150 to $700, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Cylinder 8 injector circuit performance faults cause imprecise fuel delivery, misfire risk, and elevated emissions that may damage the catalytic converter over time.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P02F5 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Fuel Injection System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
