OBD Guide
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P1124

Throttle Control Motor Relay Circuit Short

P1124 is an OBD-II diagnostic trouble code meaning: Throttle Control Motor Relay Circuit Short. Common causes: short circuit in relay circuit, throttle control relay malfunction. Estimated repair cost: $6–33.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–33 (est.)

Symptoms

  • Engine transition to emergency mode
  • Engine power limitation
  • Unstable idling
  • Dips during acceleration
  • Check Engine Light Illuminates

Causes

  • Short circuit in relay circuit
  • Throttle control relay malfunction
  • Wiring harness damage
  • Contact corrosion
  • Problems with the engine control unit

How to Fix

  1. Check the integrity of the wiring harness
  2. Check the condition of the throttle control relay
  3. Check contacts for corrosion
  4. Test control circuit for short circuit
  5. If necessary, replace the relay or repair the wiring

Related codes

P1121P1122P1123

Error P1124 by Vehicle Brand

FordKiaLincolnMazdaMercurySubaruVolkswagen

FAQ

What does the P1124 code mean?

P1124 is an OBD-II diagnostic trouble code that indicates: Throttle Control Motor Relay Circuit Short

What causes a P1124 error code?

The most common causes of P1124 include: Short circuit in relay circuit; Throttle control relay malfunction; Wiring harness damage; Contact corrosion.

How do I fix a P1124 diagnostic trouble code?

To fix P1124: Check the integrity of the wiring harness. Check the condition of the throttle control relay. Check contacts for corrosion. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1124?

Limited driving only, diagnose soon

How much does it cost to fix P1124?

The estimated repair cost for P1124 is $6–33. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat