Cylinder 1 Injector Circuit Range/Performance
The P02EE code indicates that the Engine Control Module (ECM) has detected a malfunction in the electrical circuit or performance of the fuel injector for cylinder 1. This can be due to an open or short circuit in the injector wiring, a faulty injector, or issues with the ECM itself. The injector circuit is monitored for proper voltage and current flow; when the readings fall outside the expected range, this code is set.
1. Most Common Causes
- Faulty, dirty, or internally shorted/open coil in cylinder 1 injector
- Open or short circuit in the injector wiring harness
- Loose, corroded, or poor continuity at the injector electrical connector
- Failed transistor driver inside the engine control module (ECM/PCM)
- Mechanical injector issues such as stuck needle, damaged seat, or internal leakage
2. Symptoms You Will Notice
- Engine misfire on cylinder 1
- Rough idle or hesitation during acceleration
- Check Engine Light illuminated
- Decreased fuel economy
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm the code and check for other related codes.
Step 2: Visually inspect the injector wiring and connector for damage or corrosion.
Step 3: Measure the resistance of the injector; compare to manufacturer specs (typically 12-16 ohms).
Step 4: Perform a injector balance test or use a noid light to check for injector pulse.
Step 5: If wiring and injector are good, test the ECM output for cylinder 1 injector control.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as the misfire can damage the catalytic converter and cause poor performance. Short trips to a repair shop are acceptable.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, depending on whether the injector needs replacement or just wiring repair.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.