CorollaFix

P2127 – Throttle/Pedal Position Sensor/Switch E Circuit Low Input

System
ETCS (throttle)
Dashboard light
Check engine light (MIL)
Check-engine blink code
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Applies to
Generic OBD-II meaning. Not every code is used by this car.
Description
Throttle/Pedal Position Sensor/Switch E Circuit Low Input
Detection / symptoms
1.Check engine light on 2.Rough or low idle 3.Stalling 4.Surging 5.No/little acceleration
Possible causes
1.TPS not mounted securely 2.TPS circuit short to ground or another wire 3.Faulty TPS 4.Damaged computer (PCM)
What to check
1.Read the code with an OBD-II scanner 2.Check the throttle body and pedal sensor connectors 3.Clean a dirty throttle body; do not force the valve by hand 4.Clear the code; some cars need an idle relearn after cleaning
Confidence
medium (generic OBD-II definition, not checked against the factory manual for this car)

Generic OBD-II meaning (obd-codes.com), not checked against this car's factory manual. Clear the code and test-drive to confirm it returns. Search all fault codes · Common problems · Warning lights

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