Chevy Express P0108:  MAP Barometric Sensor → High Input 

  P0108 is a generic OBD-II trouble code.  It indicates your Chevy Express’s MAP (manifold absolute pressure) sensor’s voltage reading is outside of the normal operating range.  The voltage is too high.  It’s most commonly caused by a bad MAP sensor, wiring issue, or vacuum leak. The MAP sensor measures the air pressure coming into … Read more Chevy Express P0108:  MAP Barometric Sensor → High Input 

Chevy Express P0443: EVAP System Purge Control Valve Circuit – Malfunction

P0443 is a very common OBD2 code.  It’s generic, which means that it has the same meaning for the Chevy Express as it would for any other vehicle.  If your Express has this code, it is indicating the EVAP purge control valve circuit is malfunctioning..  This is typically caused by a short in the wiring … Read more Chevy Express P0443: EVAP System Purge Control Valve Circuit – Malfunction

Chevy Express P0521: Oil Pressure Sensor Switch → Performance/Range

P0521 is an OBD2 diagnostic code that is triggered when your Chevy Express detects that the value being sent from the oil pressure sensor is out of its normal operating range. It is typically caused by a bad oil pressure sensor or an issue with the oil system, and should be diagnosed and fixed right … Read more Chevy Express P0521: Oil Pressure Sensor Switch → Performance/Range

Chevy Express: Bad Torque Converter → Symptoms + Diagnosis

Your Chevy Express’s torque converter is responsible for converting the energy generated by the engine at the flywheel and transferring it to the transmission, creating a bridge between the engine and the transmission.   In the Chevy Express, a bad torque converter is often caused by bad transmission fluid, worn clutches, bad seals, or loose … Read more Chevy Express: Bad Torque Converter → Symptoms + Diagnosis