Source-backed diagnostic reference

P1891 EV diagnostic code

Throttle Position Sensor PWM Signal Low

Reference status: This page preserves source-backed code definitions for discovery. Manufacturer/model applicability, repair steps and safety conclusions are not treated as verified unless a manufacturer-specific verified report is available.

Reference definitions

BUICK: Throttle Position Sensor PWM Signal Low Source
CADILLAC: Throttle Position Sensor PWM Signal Low Source
CHEVY: Throttle Position Sensor PWM Signal Low Source
FORD: Transmission Transfer Case Contact Plate Ground Return Open Circuit Source
GM: Throttle Position Sensor PWM Signal Low Source
GMC: Throttle Position Sensor PWM Signal Low Source
LINCOLN: Transmission Transfer Case Contact Plate Ground Return Open Circuit Source
MERCURY: Transmission Transfer Case Contact Plate Ground Return Open Circuit Source
OLDSMOBILE: Throttle Position Sensor PWM Signal Low Source
OTHER: Transmission Transfer Case Contact Plate Ground Return Open Circuit Source
SATURN: Throttle Position Sensor PWM Signal Low Source

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