Possible causes – Mechanical timing fault– Blocked oil passage– Low oil level– Failed actuator assembly– Faulty camshaft position sensor– Faulty crankshaft position sensor Tech description If this DTC started after recent internal engine repairs, inspect for proper engine mechanical timing. With the camshaft cover removed and the #1 cylinder at top dead center, make sure…
Tag: GMC
P0442 GMC Evaporative Emission Control System Leak Detected Small Leak
Possible causes – Missing or loose fuel cap– Incorrect fuel filler cap used– Fuel filler cap remains open or fails to close– Foreign matter caught in fuel filler cap– EVAP canister or fuel tank leaks– EVAP system hose leaking– Fuel tank leaking Tech description The P0442 code means that the control module has detected a…
P0455 GMC Evaporative Emission Control System Leak Detected Gross Leak
Possible causes – Missing or loose fuel cap– Incorrect fuel filler cap used– Fuel filler cap remains open or fails to close– Foreign matter caught in fuel filler cap– EVAP canister or fuel tank leaks– EVAP system hose leaking– Fuel tank leaking Tech description The P0455 it
P0756 GMC 2-3 Shift Solenoid Valve Performance – No First or Second Gear
Possible causes – Low transmission fluid level– Dirty transmission fluid– Faulty 2-3 Shift Solenoid Valve– 2-3 Shift Solenoid Valve harness or connectors– 2-3 Shift Solenoid Valve circuit is open or shorted When is the obd code mean? When the Powertrain Control Module (PCM) detects a 4-3-3-4 shift pattern, then DTC P0756 sets. Symptoms – Engine…
P0758 GMC 2-3 Shift Solenoid Circuit Electrical
Possible causes – Low transmission fluid level– Dirty transmission fluid– Faulty 2-3 Shift Solenoid Valve– 2-3 Shift Solenoid Valve harness or connectors– 2-3 Shift Solenoid Valve circuit is open or shorted When is the obd code mean? When the Powertrain Control Module (PCM) detects a continuous open, short to ground or short to power in…
P0746 GMC Pressure Control Solenoid Performance or Stuck Off
Possible causes – Low transmission fluid level– Dirty transmission fluid– Faulty line pressure solenoid valve– Line pressure solenoid valve harness is open or shorted– Line pressure solenoid valve circuit poor electrical connection When is the obd code mean? The gear required by the Engine Control Module (ECM) does not match the actual gear when driving…
P0747 GMC Pressure Control Solenoid A Stuck On
Possible causes – Low transmission fluid level– Dirty transmission fluid– Faulty Pressure Control Solenoid– Pressure Control Solenoid harness is open or shorted– Pressure Control Solenoid circuit poor electrical connection Tech description When the a transmission solenoid is stuck on, in most cases the problem is not the electrical part of the solenoid; the problem is…
P0523 GMC Engine Oil Pressure Sensor Circuit High Voltage
Possible causes – Low oil level or motor mechanical fault– Faulty Oil Pressure sensor– Oil Pressure Sensor harness is open or shorted– Oil Pressure Sensor circuit poor electrical connection When is the obd code mean? The P0522 is set when the Powertrain Control Module (PCM) senses a signal voltage higher than the normal operating range…
P0522 GMC Engine Oil Pressure Sensor Circuit Low Voltage
Possible causes – Low oil level or motor mechanical fault– Faulty Oil Pressure sensor– Oil Pressure Sensor harness is open or shorted– Oil Pressure Sensor circuit poor electrical connection When is the obd code mean? The P0522 is set when the Powertrain Control Module (PCM) senses a signal voltage lower than the normal operating range…
P0894 GMC Torque Converter Clutch Fluid Diagram
Possible causes – Low transmission fluid level – Dirty or contaminated fluid – Internal transmission failure When is the obd code mean? When the Powertrain Control Module (PCM) detects excessive Torque Converter Clutch (TCC) slip when the TCC should be engage, then the trouble code P0894 is set. P0894 GMC OBD Code Description