P1191 Possible Causes
- Faulty Electronic Throttle System (ETS) motor
- Faulty Electronic Throttle System (ETS)
- Electronic Throttle System (ETS) unit
- Electronic Throttle System (ETS) harness is open or shorted
- Poor electrical connection in Electronic Throttle System (ETS) circuit
How is P1191 Code Repaired?
Start by checking the “possible causes” listed above. Visually inspect the corresponding cable harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Engine light on (or engine service warning light soon)
P1191 Meaning
The Electronic Throttle System (ETS) consists of an ETS unit, ETS motor, Accelerator Pedal Position Sensor (APS), Throttle Position Sensor (TPS), and Limp home valve.
Among the parts mentioned above, the Limp home valve is fixed under the throttle body and helps air flow from the outside through this valve into the engine combustion chamber to prevent the vehicle from stalling the engine when the Powertrain Control Module (PCM) detects an ETS system malfunction.