Cylinder 6 Injector Circuit Low
The P0276 code indicates that the Engine Control Module (ECM) has detected a low voltage or resistance condition in the electrical circuit for the fuel injector on cylinder 6. This typically means the injector circuit is drawing less current than expected, which can be caused by a faulty injector, wiring issues, or a problem with the ECM. The injector may not open properly, leading to insufficient fuel delivery to cylinder 6, causing misfires and performance issues.
1. Most Common Causes
- Faulty fuel injector on cylinder 6 (altered internal resistance or open coil)
- Injector circuit wiring shorted to ground
- Corroded, loose, or high-resistance injector connector
- High resistance in the wiring due to damage, wear, or poor splice
- Internal ECM/PCM failure (less common)
2. Symptoms You Will Notice
- Engine misfire on cylinder 6
- Rough idle or hesitation
- Check Engine Light illuminated
- Decreased fuel economy
- Possible engine stalling
3. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect the injector connector and wiring for damage or corrosion.
Step 3: Measure resistance of cylinder 6 injector; compare to specification (typically 12-16 ohms).
Step 4: Check for voltage and ground at the injector connector with key on engine off.
Step 5: Perform a injector balance test or use a noid light to confirm injector pulse.
Step 6: If wiring and injector are good, test the ECM output for cylinder 6.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive for long distances as the misfire can damage the catalytic converter and cause further engine issues. Short trips to a repair shop are acceptable.
How much does it cost to fix?▼
The cost typically ranges from $150 to $400, depending on whether the injector needs replacement and labor rates. Diagnostic fees may be additional.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.