Chevrolet car fault codes and warning indicators, with meanings, causes, and step-by-step fixes.
24 models · 3 error codes
On Chevrolet vehicles, P1133 means the upstream oxygen sensor (bank 1, sensor 1) is not switching between rich and lean often enough — a lazy sensor.
On Chevrolet vehicles, P1258 means the engine has entered coolant-overtemperature protection mode — GM cuts fuel to some cylinders to protect the engine from overheating.
On Chevrolet vehicles, P1336 means the crankshaft position system variation (CASE) relearn has not been performed — needed so the ECM can accurately detect misfires.
These codes apply across Chevrolet models, including:
