Cylinder 2 Injector Circuit Range/Performance
The P02EF code indicates that the Engine Control Module (ECM) has detected a malfunction in the electrical circuit or performance of the fuel injector for cylinder 2. This could be due to an open or short circuit, high resistance, or a mechanical issue with the injector itself, causing improper fuel delivery. The ECM monitors injector circuit voltage and response time; if these fall outside expected parameters, the code is set.
01. Most Common Causes
- Faulty fuel injector on cylinder 2
- Open or short in injector wiring or connector
- Engine Control Module (ECM) failure
- Corroded or damaged injector harness
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine misfire or rough idle
- Reduced fuel economy
- Hesitation or lack of power during acceleration
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm P02EF and check for other codes.
Step 2: Visually inspect the injector wiring and connector for damage or corrosion.
Step 3: Measure injector resistance with a multimeter; compare to spec (typically 11-17 ohms).
Step 4: Perform a injector balance test or flow test to verify performance.
Step 5: Check for power and ground at the injector connector with a test light or multimeter.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause engine misfire, catalytic converter damage, and poor performance. Have it diagnosed promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, but can be higher if the injector or ECM needs replacement.