Cylinder 8 Injector Circuit Range/Performance
The P02F5 code indicates that the Engine Control Module (ECM) has detected an issue with the electrical circuit or performance of the fuel injector for cylinder 8. This could be due to a faulty injector, wiring problems, or a malfunctioning ECM. The injector circuit is monitored for proper voltage, resistance, and response time; any deviation from expected values triggers this code.
1. Most Common Causes
- Faulty, clogged, or out-of-spec internal resistance in cylinder 8 fuel injector
- Damaged, worn, or corroded wiring or connector in the cylinder 8 injector circuit
- Excessive resistance due to loose connection in the harness or injector connector pins
- Internal failure of the injector driver within the PCM/ECM
- Poor ground in the injector circuit
2. Symptoms You Will Notice
- Engine misfire on cylinder 8
- Rough idle or hesitation
- Check Engine Light illuminated
- Decreased fuel economy
3. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect injector connector and wiring for damage.
Step 3: Test injector resistance with a multimeter (specs: 11-16 ohms).
Step 4: Perform a injector balance test or flow test.
Step 5: Check for power and ground at injector connector with key on.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended as it can cause engine misfire, reduced performance, and potential catalytic converter damage.
How much does it cost to fix?▼
Diagnosis typically costs $50-$150. Injector replacement ranges from $200-$600 depending on vehicle.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.