Hummer H2 P0320: Meaning, Causes, & Diagnosis

P0320 is a relatively common ignition-related trouble code. P0320 indicates that your Hummer H2’s ignition/distributor engine speed circuit is malfunctioning. P0320 is most likely caused by the engine speed sensor, or a wiring issue. P0320 Definition:  Ignition/Distributor Engine Speed – Input Circuit Nearly all modern vehicles, including the Hummer H2, use individual coil packs which … Read more

Hummer H2: P0717 Meaning, Causes, & Diagnosis

P0717 is a somewhat rare OBD2 trouble code that can occur in the Hummer H2.  While it illuminates the check engine light, the code warns of a transmission-related error, specifically that the input shaft/turbine speed sensor is not sending a signal. P0717 is a generic code (it has the same meaning for any vehicle made … Read more

Hummer H2 P0846: Meaning, Causes, + Diagnosis

P0846 is a relatively common trouble code.  While your Hummer H2’s check engine light will come on, P0846 is a transmission-related trouble code, specifically the transmission fluid pressure sensor circuit. It’s a generic code, so P0846 has the same definition for any vehicle made for the 1996 model year and up.  Before doing anything, check … Read more

Hummer H2 P0841: Meaning, Causes, + Diagnosis

P0841 is a relatively common trouble code.  While your Hummer H2’s check engine light will come on, this particular code indicates that there’s something wrong with the transmission, specifically the transmission fluid pressure sensor circuit. It’s a generic code, so P0841 has the same definition for any vehicle made for the 1996 model year and … Read more

Hummer H2 P0894: Meaning, Causes, & Diagnosis

P0894 is a somewhat common DTC trouble code.  It indicates that your Hummer H2’s transmission may be slipping.  It does not specify what part of the transmission is the problem. While P0894 is a general diagnostic trouble code (same definition for the H2 as any other vehicle), it is far and away most common on … Read more

Hummer H2 P0882:  Meaning, Causes + Diagnosis

P0882 is a generic DTC trouble code, which means it has the same meaning for the Hummer H2 as it would any other vehicle.  While this code sets the check engine light, it is actually warning you of an issue with the TCM transmission control module, specifically that the power input signal is too low. … Read more

Hummer H2 P0868: Meaning, Causes, & Diagnosis

P0868 is a generic DTC code, which means it has the same definition for the Hummer H2 as it would any other vehicle.  This particular code indicates that the transmission fluid pressure is below the minimum operating specs. If your H2 has P0868 the first thing you should do is check the transmission fluid.  If … Read more

Hummer H2 P0358: Coil Pack “H” Malfunctioning – Diagnosis

P0358 is a generic OBD II diagnostic code that indicates an issue with the ignition coil “H” (it’s the eighth cylinder). Specifically with the primary or secondary wiring circuits. If your Hummer H2 has thrown P0358, it may be accompanied by P0308 (this code indicates that the eighth cylinder is misfiring).  Addressing P0358 should take … Read more

Hummer H2 P0357: Coil Pack “G” Malfunctioning – Diagnosis

P0357 is a generic OBD II diagnostic code that indicates an issue with the ignition coil “G” (it’s the seventh cylinder). Specifically with the primary or secondary wiring circuits. If your Hummer H2 has thrown P0357, it may be accompanied by P0307 (this code indicates a misfire in cylinder seven).  Addressing P0357 should take care … Read more

Hummer H2 P0715: Symptoms, Causes, & Diagnosis

P0715 is a generic, and somewhat rare OBDII trouble code.  If your Hummer H2 has P0715, it indicates there is a communication error with the sensor that measures transmission input speed.  Common Causes: A bad transmission speed sensor, shift solenoid, wiring issues, and even low/no transmission fluid can all cause P0715. P0715 Definition: Input/Turbine Speed … Read more