P2620
Throttle Position Output Circuit/Open
Throttle / pedal position
Generic OBD-II
Medium
What it means
P2620 means the throttle-position output signal circuit is open, so the ECM can't reliably report or relay throttle position. Electronic throttle systems often respond by limiting power to a safe limp mode.
Medium
Can I keep driving? You can usually drive, but the vehicle may drop into reduced-power (limp) mode with sluggish throttle response until it's fixed.
Common symptoms
What you'll notice
- Check-engine light on
- Reduced engine power or limp mode
- Poor or erratic throttle response
- Hesitation on acceleration
Common causes
Most likely first
- Open or shorted wire in the throttle-position output circuitLikely
- Poor or corroded connector at the throttle body/pedal or ECMCommon
- Faulty throttle position sensorCommon
- Dirty or carbon-filled throttle bore affecting the sensorLess often
- Faulty ECMLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame, then check the throttle/pedal connector for a steady 5-volt reference and a clean ground with the key on.
- Inspect the output-signal wiring for opens, shorts, or chafing.
- Clean the throttle bore if it's carbon-fouled.
- Test the throttle position sensor and replace it if out of range.
- If the circuits and sensor are good, suspect the ECM. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2620?+
Short trips are usually possible, but reduced-power mode makes merging and hills risky. Get it checked promptly.
Can I just clear P2620?+
It'll come back until the open circuit or sensor fault is repaired.
Related codes
Often seen with P2620
Read & clear P2620 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX