OBD Guide
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B1989

Pedal Position Rearward Switch Circuit Short to Battery

B1989 is an OBD-II diagnostic trouble code meaning: Pedal Position Rearward Switch Circuit Short to Battery. Common causes: wiring harness damage, short circuit in the sensor circuit. Estimated repair cost: $33–111.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–111 (est.)

Symptoms

  • Check Engine Light Is On
  • Incorrect response to the gas pedal
  • Engine power limitation
  • The car goes into emergency mode

Causes

  • Wiring harness damage
  • Short circuit in the sensor circuit
  • Oxidation of connector contacts
  • Pedal position sensor malfunction
  • Problems with the accelerator pedal module

How to Fix

  1. Visually inspect the wiring harness and connectors for damage
  2. Checking the continuity of the sensor circuit using a multimeter
  3. Diagnostics of pedal position sensor signals
  4. Replacing damaged wires or connectors
  5. If necessary, replace the pedal position sensor or pedal module

Related codes

B1988P2122P2127P2138

FAQ

What does the B1989 code mean?

B1989 is an OBD-II diagnostic trouble code that indicates: Pedal Position Rearward Switch Circuit Short to Battery

What causes a B1989 error code?

The most common causes of B1989 include: Wiring harness damage; Short circuit in the sensor circuit; Oxidation of connector contacts; Pedal position sensor malfunction.

How do I fix a B1989 diagnostic trouble code?

To fix B1989: Visually inspect the wiring harness and connectors for damage. Checking the continuity of the sensor circuit using a multimeter. Diagnostics of pedal position sensor signals. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1989?

Limited driving only, diagnose soon

How much does it cost to fix B1989?

The estimated repair cost for B1989 is $33–111. Actual cost depends on your vehicle, location, and labor rates.

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