P1890 GMC - Throttle Position Signal Input
- 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)
P1890 Gmc DescriptionWith the key on or engine running, the Powertrain Control Module (PCM) determines that the throttle position or throttle angle signal was unreliable for 1 second.
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