Description OBD-II Trouble Code Description for P0446 Hummer Evaporative Emission System Vent Control Circuit What does this mean? OBD2 Code P0446 Hummer definition: Evap vent valve has only one purpose. It closes in order to seal the vent so the EVAP system can pressurize and ensure there are no leaks. Evap vent valve is usually…
Category: HUMMER
Hummer P0445 EVAP Purge Solenoid Circuit
Description OBD-II Trouble Code Description for P0445 Hummer Evaporative Emission System Purge Control Valve Circuit Shorted What does this mean? OBD2 Code P0445 Hummer definition: The optical sensor provides a high resolution signal to the Powertrain Control Module (PCM) by counting pulses on the sensor disk located in the injection pump. The high resolution is…
Hummer P0443 EVAP Canister Purge Valve Circuit Malfunction
Description OBD-II Trouble Code Description for P0443 Hummer Evaporative Emission System Purge Control Valve Circuit What does this mean? OBD2 Code P0443 Hummer definition: The Evaporative Emissions System (EVAP) allows fumes from the gas tank to enter the engine to be burned, rather than vented into the atmosphere as an emission. The purge valve solenoid…
Hummer P0444 Evaporative Emission Control System Purge Control Valve Circuit Open
Description OBD-II Trouble Code Description for P0444 Hummer Evaporative Emission System Purge Control Valve Circuit Open What does this mean? OBD2 Code P0444 Hummer definition: The optical sensor provides a high resolution signal to the Powertrain Control Module (PCM) by counting pulses on the sensor disk located in the injection pump. The high resolution is…
Hummer P0442 EVAP Control System Leak Detected Small Leak
Description OBD-II Trouble Code Description for P0442 Hummer Evaporative Emission System Leak Detected (small leak) What does this mean? OBD2 Code P0442 Hummer definition: This indicates a fuel vapor leak in the EVAP control system. It means a very small leak has been detected. In fact, the leak can be from a hole as small…
Hummer P0441 EVAP System Incorrect Purge Flow
Description OBD-II Trouble Code Description for P0441 Hummer Evaporative Emission System Incorrect Purge Flow What does this mean? OBD2 Code P0441 Hummer definition: This indicates that a part of the EVAP control system is no longer fuctioning correctly. The EVAP system consists of many parts, including (but not limited to) the gas cap, fuel lines,…
Hummer P0439 Catalyst Heater Control Circuit Bank 2
Description OBD-II Trouble Code Description for P0439 Hummer Catalyst Heater Control Circuit What does this mean? OBD2 Code P0439 Hummer definition: The optical sensor provides a high resolution signal to the Powertrain Control Module (PCM) by counting pulses on the sensor disk located in the injection pump. The high resolution is one of the most…
Hummer P0440 EVAP Canister Purge Regulator Valve
Description OBD-II Trouble Code Description for P0440 Hummer Evaporative Emission System What does this mean? OBD2 Code P0440 Hummer definition: This indicates that a part of the EVAP control system is no longer fuctioning correctly. The EVAP system consists of many parts, including (but not limited to) the gas cap, fuel lines, carbon canister, purge…
Hummer P0438 Catalyst Temperature Sensor High Input Bank 2 Sensor 1
Description OBD-II Trouble Code Description for P0438 Hummer Catalyst Temperature Sensor High What does this mean? OBD2 Code P0438 Hummer definition: The optical sensor provides a high resolution signal to the Powertrain Control Module (PCM) by counting pulses on the sensor disk located in the injection pump. The high resolution is one of the most…
Hummer P0437 Catalyst Temperature Sensor Low Input Bank 2 Sensor 1
Description OBD-II Trouble Code Description for P0437 Hummer Catalyst Temperature Sensor Low What does this mean? OBD2 Code P0437 Hummer definition: The optical sensor provides a high resolution signal to the Powertrain Control Module (PCM) by counting pulses on the sensor disk located in the injection pump. The high resolution is one of the most…