Cylinder 5 Injector Circuit High
The P0274 code indicates that the Engine Control Module (ECM) has detected a high voltage or resistance in the electrical circuit for the fuel injector on cylinder 5. This typically means the injector circuit is open or shorted to voltage, preventing proper injector operation and causing a misfire.
01. Most Common Causes
- Faulty fuel injector on cylinder 5
- Open or shorted wiring in injector circuit
- Damaged connector at injector or ECM
- Failed ECM (rare)
02. Symptoms You Will Notice
- Engine misfire on cylinder 5
- Rough idle and poor acceleration
- Check Engine Light illuminated
- Possible fuel smell or decreased fuel economy
03. Step-by-Step Diagnosis
Step 1: Scan for codes and verify P0274 is present.
Step 2: Visually inspect injector connector and wiring for damage.
Step 3: Measure resistance of injector 5 (should be 11-18 ohms).
Step 4: Check for voltage at injector connector with key on (should be battery voltage).
Step 5: Perform a continuity test from injector to ECM.
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.
How much does it cost to fix?▼
Repair costs range from $150 to $400 depending on whether the injector or wiring needs replacement.