Quick Diagnosis Guide
Meaning: Code P0305 indicates that the vehicle's onboard computer (ECU) has registered a fault in the powertrain (p) circuits.
Can I still drive? No. Safe engine shutdown is recommended.
What does the P0305 code mean?
Diagnostic Trouble Code (DTC) P0305 stands for Cylinder 5 Misfire Detected. This is a generic OBD-II trouble code indicating that the ECU has detected system performance parameters that fall outside normal calibrated tolerances.
When this code is logged, the ECU illuminates the dashboard check engine light and triggers a freeze frame record of engine sensor values to help diagnose the issue.
Common Symptoms of Code P0305
Depending on the vehicle make and driving conditions, you may observe the following symptoms:
- Rough engine sound
- Loss of torque
- Flashing MIL
What causes the P0305 fault code?
Root causes for a P0305 code typically include:
- Potential Cause 1: Ignition coil or plug failure
- Potential Cause 2: Low compression
- Potential Cause 3: Bank 2 wiring fault
Repair Database Status
No verified vehicle-specific workshop fix is currently logged in our mobile mechanic database for this code. Refer to the diagnostic checklist below to isolate the fault.
Step-by-Step Diagnostic & Inspection Checklist
To inspect and troubleshoot a P0305 code, mechanics follow these validation steps:
- Step 1: Read trouble codes with OBDAssistant.
- Step 2: Check spark plug on Cylinder 5.
Estimated Repair Cost Band
$60 - $250.
Note: Repair estimates vary based on vehicle make, model, local labor rates, and whether you require a full parts replacement.
Related Trouble Codes
If your scan tool registers other codes, check out these related guides:
Frequently Asked Questions
Depends on the engine layout. In many V6 engines, Cylinder 5 is located on Bank 2.