Injector Circuit Low Cylinder 3
The P0267 code indicates that the powertrain control module (PCM) has detected a low voltage or current condition in the electrical circuit for the fuel injector on cylinder 3. This typically means the injector's resistance is too low, there is a short to ground, or the injector driver circuit is malfunctioning. The PCM monitors the injector circuit for proper voltage and current flow; when the signal falls below a calibrated threshold, it sets this code. This can lead to incomplete fuel delivery, causing misfires, rough idle, and reduced engine performance.
01. Most Common Causes
- Faulty fuel injector on cylinder 3 (shorted internally)
- Short to ground in the injector wiring or connector
- Damaged injector driver circuit in the PCM
- Corroded or loose electrical connector at the injector
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine misfire on cylinder 3
- Rough idle or hesitation during acceleration
- Decreased fuel economy and power loss
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm P0267 and check for other related codes.
Step 2: Visually inspect the injector connector and wiring for damage, corrosion, or shorts.
Step 3: Measure resistance of injector 3; compare to specification (typically 11-18 ohms).
Step 4: Perform a voltage drop test on the injector circuit to identify shorts or high resistance.
Step 5: If wiring and injector are good, test the PCM injector driver output with a noid light or oscilloscope.
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 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 if it's a wiring issue.