P2622: Throttle Position Output Circuit High

What it means

The throttle position output circuit voltage is above the expected level. This code does not identify a particular downstream module or failed component.

At a glance

• Usually lights the check-engine light

How it works

The throttle position output circuit carries a throttle-position signal to other vehicle electronics, without identifying which downstream module receives it. P2622 sets when the output voltage is higher than expected, which can be caused by a short to battery power, an open output buffer, or a poor connector contact.

Common causes

Most likely first.

1. Output wire shorted to B+
2. Output buffer open
3. Connector pins corroded - high contact resistance

Symptoms

• Check-engine light
• Reduced engine power or sluggish throttle response

How to diagnose it

1. Review freeze-frame and live data to see when the throttle-position output rose above its expected range and whether response was affected.
2. Inspect the output wire and connectors for damage, loose or corroded pins, or contact with a battery-power feed.
3. Use the wiring diagram to check for a short to battery voltage and compare readings with the manufacturer's specification.
4. Check output-wire continuity and connector contact to find an open or high-resistance connection.
5. If wiring and connections pass, test the output buffer and control module using the manufacturer's procedure.

Common fixes

• Clean and secure corroded or loose output-circuit connector pins.
• Repair the output wire if it is shorted to battery power or damaged.
• Repair or replace a failed output buffer or control module after confirming the circuit is sound.

Can I keep driving?

Drive only if throttle response remains predictable, and avoid situations that require quick acceleration. If the engine enters reduced power or the throttle becomes erratic, stop safely; the faulty signal can further limit engine response.