Cylinder 10 Injector Circuit Range/Performance
The P02F7 code indicates that the Engine Control Module (ECM) has detected a malfunction in the electrical circuit or performance of the fuel injector for cylinder 10. This can be due to an open or short circuit, high resistance, or a faulty injector driver. The ECM monitors the injector circuit for proper voltage and current flow; when the readings fall outside the expected range, this code is set. This issue can lead to misfires, reduced fuel economy, and increased emissions.
1. Most Common Causes
- Faulty fuel injector on cylinder 10 or injector resistance out of specification
- Corroded, oxidized, or damaged wiring or connectors in the injector circuit
- Poor connection at the injector harness connector
- Failed injector driver inside the ECM/PCM
- Excessive resistance in the injector ground circuit
- Injector contamination affecting both hydraulic and electrical response
2. Symptoms You Will Notice
- Engine misfire on cylinder 10
- 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 the injector wiring and connector for damage or corrosion.
Step 3: Use a multimeter to measure resistance of cylinder 10 injector (typically 11-18 ohms).
Step 4: Perform a injector balance test or power balance test to confirm injector performance.
Step 5: Check for voltage and ground at the injector connector with the engine running.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause misfires, catalytic converter damage, and poor performance. Have it diagnosed promptly.
How much does it cost to fix?▼
The cost varies: injector replacement is $150-$400 including parts and labor; wiring repairs are typically $100-$200.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.