Chevy Express Transmission Overheating: Symptoms + Causes

Overheating is the worst thing that can happen to your Chevy Express’s transmission.  An overheating transmission will drastically shorten its service life.  If you suspect that your transmission is overheating, doing something about it now can keep you from an expensive transmission repair later.  Low transmission fluid is the number one cause of an overheating … Read more Chevy Express Transmission Overheating: Symptoms + Causes

Chevy Express P1682: Ignition 1 Switch → Circuit 2

  P1682 is a diagnostic trouble code that indicates that your Chevy Express’s ignition switch is having a voltage problem.  It is typically caused by a faulty ignition switch, although there can be other causes as well. There are two “circuits” to the ignition switch.  The first one goes to the ECM through the throttle … Read more Chevy Express P1682: Ignition 1 Switch → Circuit 2

Chevy Express Radiator Leaking:  Symptoms + Diagnosis

  Your Chevy Express’s cooling system passes antifreeze throughout its engine.  The main parts of the system are the thermostat, radiator, water pump, coolant itself, and the hoses.  If any of these parts go bad, you may experience radiator a leak.  A radiator leak is very common.  You should notice the leak directly under your … Read more Chevy Express Radiator Leaking:  Symptoms + Diagnosis

Chevy Express P0520: Oil Pressure Switch/Sensor → Circuit

  P0520 is a common OBD2 trouble code.  It’s generic, which means that it has the same meaning for the Chevy Express as it would any other vehicle.  P0520 indicates that the oil pressure sensor is operating outside of its normal “range”.  It is typically caused by a bad oil pressure sensor switch or a … Read more Chevy Express P0520: Oil Pressure Switch/Sensor → Circuit

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