Cylinder 2 Injector Circuit High
The P0265 code indicates that the Engine Control Module (ECM) has detected a high voltage or resistance in the electrical circuit of the fuel injector for cylinder 2. This typically means the injector driver circuit is shorted to power or the injector itself has high internal resistance. The ECM monitors the injector circuit for proper voltage and current; when the voltage is higher than expected, it sets this code. This can cause the injector to stay open too long or not function correctly, leading to poor engine performance.
01. Most Common Causes
- Faulty fuel injector on cylinder 2 (high internal resistance or shorted)
- Wiring or connector issue (short to power, chafed wire, corrosion)
- ECM failure (rare)
02. Symptoms You Will Notice
- Check Engine Light on
- Engine misfire or rough idle
- Poor fuel economy
- Reduced engine power
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect the injector wiring and connector for damage, corrosion, or shorts.
Step 3: Measure resistance of cylinder 2 injector; compare to specification (typically 11-18 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 swap injector with another cylinder to see if code follows.
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 engine misfire, catalytic converter damage, and poor performance. Short trips to a repair shop are acceptable.
How much does it cost to fix?▼
The cost ranges from $150 to $400, including diagnosis and replacement of the injector or repair of wiring. Labor is typically $100-$200, and parts $50-$200.