P2140

Throttle/Pedal Position Sensor/Switch E/F Voltage Correlation

Q: Is it safe to drive with P2140?

It usually still moves, but with the two signals disagreeing the ECM often limits power. Keep speeds low and get it diagnosed promptly.

Q: Can I just clear P2140?

It returns as soon as the sensor signals disagree again; the faulty element or wiring has to be repaired for it to stay off.

Throttle / pedal position Generic OBD-II Medium

What it means

P2140 sets when the two throttle/accelerator-pedal position signals ('E' and 'F') that should agree read differently enough that the ECM can't trust them. Because the module can't confirm pedal position, it usually drops into a reduced-power fail-safe mode until the disagreeing sensor or its wiring is repaired.

Medium

Can I keep driving? The car usually runs but commonly drops into reduced-power limp mode because the ECM can't trust the pedal signal; drive gently and get it checked soon.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Appears alongside · share of P2140 scans

P2132in 74.7% of scans

P0335in 73.3% of scans

P0698in 73.3% of scans

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Check-engine light on
Reduced engine power / limp mode
Poor or erratic throttle response
Unstable idle or hesitation

Common causes

Most likely first

Faulty throttle/pedal position sensor ('E' or 'F' element)Likely
Open, shorted, or chafed wiring causing one signal to driftCommon
Poor or corroded sensor connectorCommon
Dirty or carbon-filled throttle bore skewing a readingLess often
Faulty ECM (rare)Less often

How to diagnose & fix

Work through it in order

Scan live data and compare the E and F signals — they should track together across pedal/throttle travel.
Inspect the connectors and wiring for both circuits for damage or corrosion.
Confirm a steady 5-volt reference and good ground at the sensor.
Clean the throttle bore if carbon is affecting readings.
Replace the position sensor if the two elements won't correlate; retest before replacing the ECM.

FAQ

Quick answers

Is it safe to drive with P2140?+

It usually still moves, but with the two signals disagreeing the ECM often limits power. Keep speeds low and get it diagnosed promptly.

Can I just clear P2140?+

It returns as soon as the sensor signals disagree again; the faulty element or wiring has to be repaired for it to stay off.

Read & clear P2140 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX