Cylinder 12 Injector Circuit High
The P0295 code indicates that the powertrain control module (PCM) has detected a high voltage or resistance in the electrical circuit for the fuel injector on cylinder 12. This typically points to a short to voltage, open circuit, or a faulty injector driver. The injector circuit includes the injector itself, wiring, connectors, and the PCM driver. A high circuit condition can cause the injector to malfunction, leading to misfires, poor fuel economy, and potential engine damage if not addressed.
01. Most Common Causes
- Faulty fuel injector on cylinder 12
- Short to voltage in injector wiring or connector
- Open circuit in injector wiring
- Failed PCM or injector driver
02. Symptoms You Will Notice
- Engine misfire on cylinder 12
- Rough idle or hesitation
- Check Engine Light illuminated
- Decreased fuel economy
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm P0295 and check for other codes.
Step 2: Visually inspect injector wiring and connector for damage, corrosion, or shorts.
Step 3: Measure resistance of cylinder 12 injector and compare to specification (typically 12-16 ohms).
Step 4: Check for voltage at injector connector with key on; should be battery voltage on one pin.
Step 5: Perform a injector balance test or use a noid light to verify PCM injector driver operation.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code as it can cause misfires, reduced performance, and potential catalytic converter damage. Have the vehicle diagnosed and repaired promptly.
How much does it cost to fix?▼
Repair costs vary: injector replacement $150-$400, wiring repair $100-$300, PCM replacement $500-$1000. Diagnosis typically $100-$150.