P1891 GMC - Throttle Position Sensor PWM Signal Low
- Faulty Throttle Position Sensor
- Throttle Position Sensor harness is open or shorted
- Throttle Position Sensor circuit poor electrical connection
- Engine Light ON (or Service Engine Soon Warning Light)
P1891 Gmc DescriptionThrottle Position Sensor PWM Signal Low is the generic description for the P1891 Gmc code, but the manufacturer may have a different description. Currently we have no further information abouth the P1891 Gmc OBDII code. Please post your question on our "Questions" section for more information: AutoCodes.com Questions.
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