Chevrolet OBD Codes: Meaning & Fixes

P0300 Powertrain The engine computer sees misfires that jump between cylinders or hit several cylinders at once. High P0420 Powertrain The bank 1 catalytic converter no longer stores enough oxygen to clean the exhaust properly. Low P0430 Powertrain The bank 2 converter on a V6, V8 or split-exhaust engine isn't cleaning the exhaust well enough. Low C0035 Chassis The ABS module lost a valid signal from the driver-side front wheel speed sensor. Moderate P0171 Powertrain The engine computer is adding the maximum extra fuel it's allowed on bank 1 and still sees… Moderate P0299 Powertrain The turbo or supercharger isn't building the boost pressure the engine computer is asking for. Moderate

B0012 Body Airbag firing-loop fault; location depends on the make: passenger dash airbag or, on GM… High B0013 Body Fault in the firing loop of the front passenger's knee airbag near the glovebox; GM uses… High B0022 Body Fault in the second firing loop of the left roof-rail curtain airbag; GM and others use B0022… High B0051 Body SAE: front middle seat buckle sensor fault. On GM vehicles: the airbag module has logged… High B0057 Body SAE: third-row middle buckle sensor fault. GM: fault in the front passenger belt pretensioner… High B0074 Chevrolet · Body The pressure sensor mat inside the passenger seat cushion is giving bad or no readings. High B0081 Chevrolet · Body The airbag module reports a problem with the passenger presence module under the right front… High C0545 Chevrolet · Chassis The electric power steering module can't trust its torque sensor, so steering assist may cut… High P0016 Powertrain The bank 1 intake cam and the crankshaft are out of step, most often from a stretched or jumped… High P0018 Powertrain The bank 2 intake cam is out of step with the crankshaft on a V or boxer engine; chain wear… High P0216 Powertrain The ECU can't control or confirm injection timing, usually on a diesel with an electronic… High P0300 Powertrain The engine computer sees misfires that jump between cylinders or hit several cylinders at once. High P0335 Powertrain The engine computer lost the crankshaft position signal. Expect stalling or a crank-no-start. High P0642 Powertrain The PCM's 5-volt supply 'A' is being pulled below spec, usually by a short to ground in one… High P06DD Powertrain The ECM commanded an oil pressure change and the measured pressure didn't respond – check… High P0751 Powertrain Solenoid A is wired fine but its valve isn't doing its job, so gears are missing – often stuck… High P0756 Powertrain Solenoid B isn't moving fluid the way the TCM expects – the car may pull away in 3rd or 4th. High P0894 Powertrain The transmission computer measured slip inside the gearbox that shouldn't be there. Clutches… High P1682 Chevrolet · Powertrain The engine computer's two ignition power feeds disagree, which can cause stalling or Reduced… High U0101 Network The engine computer and other modules stopped hearing from the transmission control module. High U0107 Network The engine computer can't reach the module that drives the electronic throttle, so power is cut… High U0109 Network The PCM lost contact with the module that controls fuel pump speed; stalling or no-start can… High