OBD2 Trouble Codes
An OBD2 trouble code is a clue, not a definitive diagnosis. A code can point toward an affected system or condition, but further diagnostic checks are often needed before any part should be replaced.
- P0300 Moderate
P0300 Code: Random/Multiple Cylinder Misfire Detected
P0300 means your vehicle's computer detected a random or multiple-cylinder misfire pattern. Combustion isn't happening properly in one or mo…
- P0420 Moderate
P0420: Catalyst System Efficiency Below Threshold (Bank 1)
P0420 means your vehicle's catalyst monitor detected that the Bank 1 catalytic converter isn't behaving as efficiently as expected, based on…