Fixes & Diagnostics

P0304 on a Chevy Silverado indicates a misfire specifically in cylinder 4. Unlike P0300 (random multi-cylinder misfire), P0304 pinpoints the […]

P0455 on a Chevy Silverado indicates the EVAP (evaporative emission control) system has detected a large leak — meaning fuel

P0449 on a Chevy Silverado indicates the ECM has detected a problem with the EVAP vent solenoid circuit — either

P0420 on a Chevy Silverado means the ECM has detected that the catalytic converter on Bank 1 (driver’s side) is

P0175 on a Chevy Silverado indicates the ECM has detected a rich air/fuel mixture on Bank 2 — the passenger

P0430 on a Chevy Silverado indicates the catalytic converter on Bank 2 (passenger side) is operating below efficiency requirements. It’s

P0507 on a Chevy Silverado means the ECM has detected that idle speed is higher than the target — the

P0118 on a Chevy Silverado means the ECM is receiving an abnormally high voltage signal from the Engine Coolant Temperature

P0172 on a Chevy Silverado means the engine control module (ECM) has detected that the Bank 1 air/fuel mixture is