P2124

Throttle/Pedal Position Sensor/Switch D Circuit Intermittent

Q: Is it safe to drive with P2124?

It can be, but intermittent faults may cause sudden power loss, so treat quick-acceleration situations with caution until it's fixed.

Q: Can I just clear P2124?

Yes, but intermittent wiring or connector faults will set it again; the cause has to be found and repaired to keep it away.

Fuel & air metering Generic OBD-II Medium

What it means

P2124 means the ECM saw an intermittent or erratic signal from the 'D' throttle/pedal position sensor circuit — the reading cut out or jumped briefly. Because the computer needs a steady throttle signal, these dropouts can trigger momentary limp mode or hesitation. The cause is most often a flexing or corroded wire/connector rather than the sensor itself.

Medium

Can I keep driving? Often drivable, but an intermittent signal can trigger sudden limp mode or power drops without warning — repair before relying on the car.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

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
Intermittent reduced power / limp mode
Momentary hesitation or surging on acceleration
Rough or fluctuating idle

Common causes

Most likely first

Intermittent open/short in the 'D' sensor wiring (chafed or flexing harness)Likely
Poor or corroded connection at the sensor or PCM connectorCommon
Faulty throttle/pedal position sensor (the 'D' element)Common
Faulty engine/powertrain control module (rare)Less often

How to diagnose & fix

Work through it in order

Read freeze-frame data, then wiggle-test the connector and harness to reproduce the dropout.
Inspect the connector pins for corrosion, spread terminals, or looseness.
Check for a steady ~5 V reference and clean ground; watch the signal for glitches while flexing the harness.
Repair any chafed or intermittent wiring between the sensor and PCM.
If the circuit checks good, replace the throttle/pedal position sensor.

FAQ

Quick answers

Is it safe to drive with P2124?+

It can be, but intermittent faults may cause sudden power loss, so treat quick-acceleration situations with caution until it's fixed.

Can I just clear P2124?+

Yes, but intermittent wiring or connector faults will set it again; the cause has to be found and repaired to keep it away.

Read & clear P2124 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