Cylinder 2 Injector Circuit Low
The P0264 code indicates that the engine control module (ECM) has detected a low voltage or current condition in the electrical circuit of the fuel injector for cylinder 2. This typically means the injector's resistance is too high, the wiring is damaged, or the injector driver circuit in the ECM is faulty. The injector may not open properly, causing a lean misfire and reduced engine performance.
1. Most Common Causes
- Faulty fuel injector (high resistance or shorted)
- Open or shorted wiring in the injector circuit
- Poor electrical connection at the injector or ECM
- Failed ECM (internal injector driver)
2. Symptoms You Will Notice
- Engine misfire (rough idle, hesitation)
- Check Engine Light illuminated
- Reduced fuel economy and power
- Possible fuel smell from exhaust
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: Measure injector resistance (should be 11-18 ohms).
Step 4: Check for voltage at injector connector with key on (should be battery voltage).
Step 5: Use a noid light to test injector pulse while cranking.
Step 6: If no pulse, check wiring continuity to ECM and test ECM output.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. Driving with a misfire can damage the catalytic converter and cause poor performance.
How much does it cost to fix?▼
Typical repair costs range from $150 to $400, including parts and labor. Injector replacement is around $200-$300, while wiring repairs are less.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.