Injector Circuit Malfunction - Cylinder 7
The P0207 code indicates a malfunction in the electrical circuit of the fuel injector for cylinder 7. This means the powertrain control module (PCM) has detected an open or short circuit in the injector wiring, or the injector itself is faulty. This can cause a misfire, rough idle, and reduced engine performance. Common causes include a faulty injector, damaged wiring, or a poor electrical connection.
01. Most Common Causes
- Faulty fuel injector on cylinder 7
- Open or shorted wiring in the injector circuit
- Poor electrical connection at the injector or PCM
- Failed PCM (rare)
02. Symptoms You Will Notice
- Engine misfire on cylinder 7
- Rough idle or hesitation
- Check Engine Light illuminated
- Decreased fuel economy and power
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm the code and check for other codes.
Step 2: Visually inspect the injector wiring and connector for damage or corrosion.
Step 3: Measure resistance of the injector (typically 12-16 ohms) and compare to specifications.
Step 4: Test for power and ground at the injector connector with a multimeter.
Step 5: If wiring and injector are good, check PCM output and consider PCM replacement.
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 it can cause misfire, catalytic converter damage, and poor performance. Short trips to a repair shop are okay.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, depending on the cause. Injector replacement can be $200-$400 including labor.