P0159 GMC HO2S22 slow response sensor

Possible causes – Faulty Rear Heated Oxygen Sensor Bank 2– Rear Heated Oxygen Sensor Bank 2 harness is open or shorted– Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection– Inappropriate fuel pressure– Faulty fuel injectors– Intake air leaks may be faulty– Exhaust gas leaks Tech description Replacing the O2 Sensor 2 usually takes…

P0160 GMC O2 Sensor Circuit No Activity Detected Bank 2 Sensor 2

Possible causes – Faulty Rear Heated Oxygen Sensor Bank 2– Rear Heated Oxygen Sensor Bank 2 harness is open or shorted– Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection– Inappropriate fuel pressure– Faulty fuel injectors– Intake air leaks may be faulty– Exhaust gas leaks Tech description Replacing the Rear Heated Oxygen Sensor Bank…

P0157 GMC HO2S Circuit Low Voltage Bank 2 Sensor 2

Possible causes – Faulty Rear Heated Oxygen Sensor Bank 2– Rear Heated Oxygen Sensor Bank 2 harness is open or shorted– Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection– Inappropriate fuel pressure– Faulty fuel injectors– Intake air leaks may be faulty– Exhaust gas leaks Tech description Replacing the Rear Heated Oxygen Sensor Bank…

C0235 GMC Open Or Grounded Rear Speed Signal Circuit

Possible causes – Faulty Rear Speed Sensor– Rear Speed Sensor harness is open or shorted– Rear Speed Sensor circuit poor electrical connection– Faulty EBCM Symptoms – ABS Warning Light ON C0235 GMC OBD Code Description

C0236 GMC Missing Rear Speed Sensor Signal

Possible causes – Faulty Rear Speed Sensor– Rear Speed Sensor harness is open or shorted– Rear Speed Sensor circuit poor electrical connection– Faulty EBCM Symptoms – ABS Warning Light ON C0236 GMC OBD Code Description

P0705 GMC Transmission Range Sensor Circuit Malfunction

Possible causes – Faulty Park/Neutral Position Switch– Misadjusted Park/Neutral Position Switch– Park/Neutral Position Switch harness is open or shorted– Park/Neutral Position Switch circuit poor electrical connection When is the obd code mean? The transmission range switch detects the selector lever position and sends a signal to the Powertrain Control Module (PCM). Symptoms – Engine Light…

P0706 GMC Transmission Range Switch Performance

Possible causes – Faulty Park/neutral position switch– Misadjusted park/neutral position switch– Park/neutral position switch harness is open or shorted– Park/neutral position switch circuit poor electrical connection When is the obd code mean? The transmission range switch detects the selector lever position and sends a signal to the TCM. Symptoms – Engine Light ON (or Service…

P0604 GMC Control Module Random Access Memory

Possible causes – Faulty Powertrain Control Module (PCM)– PCM harness is open or shorted– PCM circuit poor electrical connection– PCM Programming Tech description Check the Powertrain Control Module (PCM) fuse, if fuse is OK try erasing the code first and if the code comes back you may have to reprogram or replaced the PCM. When…

P0601 GMC Power Control Module Internal Fault

Possible causes – Faulty Powertrain Control Module (PCM)– Powertrain Control Module (PCM) harness is open or shorted– Powertrain Control Module (PCM) cicuit poor electricl connection– Low battery voltage Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0601 GMC OBD Code Description

P1621 GMC Control Module Long Term Memory Performance Condition

Possible causes – Faulty Powertrain Control Modules (PCM)– Low car battery voltage When is the obd code mean? If the checksum of the Electronically Erasable Programmable Read Only Memory (EEPROM) does not match a predetermined value by the Powertrain Control Modules (PCM), DTC P1621 will set. Symptoms – Engine Light ON (or Service Engine Soon…