P0510

Closed Throttle Position Switch

Q: Is it safe to drive with P0510?

It is drivable, but the engine may stall when you slow to a stop, which can be unsafe. Have it repaired soon.

Q: Can I just clear P0510?

You can, but it returns until the switch, its adjustment, or the wiring is corrected.

Idle / throttle control Generic OBD-II High

What it means

P0510 means the ECM has detected a fault with the closed throttle position switch — the switch that tells it when the throttle is fully closed, such as at idle. When this signal is wrong or missing, the ECM cannot manage idle correctly, so the engine may idle roughly or stall when you come to a stop. The cause is usually the switch itself, its adjustment, or the wiring.

High

Can I keep driving? Drivable but the engine may idle poorly or stall when coming to a stop, so have it repaired soon.

Real-world scan data

Seen in

166

scans in the past year

Found in

<0.1%

of scans

0.1%

of scans that found faults

Appears alongside · share of P0510 scans

P2119in 39.2% of scans

P0122in 38.5% of scans

P0404in 33.1% 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
Engine stalls or nearly stalls when coming to a stop
Rough or erratic idle
Idle does not settle correctly after start-up

Common causes

Most likely first

Faulty closed throttle position switchLikely
Open or shorted wiring in the switch circuitCommon
Corroded or loose electrical connectorCommon
Misadjusted throttle stop or switch (where adjustable)Less often
Failed ECM (rare)Less often

How to diagnose & fix

Work through it in order

Read freeze-frame data and inspect the switch connector for corrosion or looseness.
Check the switch's wiring for opens and shorts and confirm it changes state as the throttle closes.
Verify the switch is correctly adjusted at the closed-throttle stop, if adjustable.
Replace the closed throttle position switch if it does not signal correctly, then clear and re-test.

FAQ

Quick answers

Is it safe to drive with P0510?+

It is drivable, but the engine may stall when you slow to a stop, which can be unsafe. Have it repaired soon.

Can I just clear P0510?+

You can, but it returns until the switch, its adjustment, or the wiring is corrected.

Read & clear P0510 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