P0124: Throttle/Pedal Position Sensor/Switch A Circuit Intermittent

What does P0124 mean?

The A position input drops out or glitches as the throttle or pedal moves. A worn sensor track or loose terminal can interrupt the signal only at certain positions.

Generic OBD-II definition: Throttle/Pedal Position Sensor/Switch A Circuit Intermittent. Confirm applicability in your vehicle service information.

Common causes

• Intermittent position sensor
• Chafed or loose A-circuit wiring
• Binding throttle mechanism or incorrect sensor adjustment

Symptoms

• Hesitation at a particular pedal position
• Surging or intermittent stall
• Reduced-power mode

Diagnostic focus

A slow scan-tool refresh may miss a brief dropout. A technician may need a scope or graphing meter to catch a worn track; do not force an electronic throttle plate during testing.

Can I keep driving with P0124?

Severity: High Unreliable throttle response can be dangerous. Do not continue driving with surging, stalling, or reduced acceleration that makes traffic unsafe; arrange recovery instead. Do not force an electronic throttle plate.

If the check engine light is flashing or the car runs badly, stop driving and have it checked.

Typical fixes

• Graph position A through its operating range
• Inspect connector tension and harness routing
• Test for a binding mechanism using the approved procedure

Sources & review

• OBD-Codes.com: P0124
• TroubleCodes.net: generic code definitions

Definitions and diagnostic background checked 2026-11-06. Generic guidance, not a substitute for the service procedure for your exact year, engine, and transmission.