OBD Guide
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B1988

Pedal Position Forward Switch Circuit Short to Battery

B1988 is an OBD-II diagnostic trouble code meaning: Pedal Position Forward Switch Circuit Short to Battery. Common causes: wiring harness damage, short circuit in pedal position sensor. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Incorrect response to pressing the gas pedal
  • Floating idle speed
  • Check Engine light comes on
  • Reduced engine power

Causes

  • Wiring harness damage
  • Short circuit in pedal position sensor
  • Oxidation or corrosion of contacts
  • Circuit Grounding Problems

How to Fix

  1. Check the integrity of the wiring harness
  2. Check the resistance and voltage at the pedal position sensor
  3. Inspect contacts for oxidation
  4. If necessary, replace the pedal position sensor

Related codes

P2122P2123P2127

FAQ

What does the B1988 code mean?

B1988 is an OBD-II diagnostic trouble code that indicates: Pedal Position Forward Switch Circuit Short to Battery

What causes a B1988 error code?

The most common causes of B1988 include: Wiring harness damage; Short circuit in pedal position sensor; Oxidation or corrosion of contacts; Circuit Grounding Problems.

How do I fix a B1988 diagnostic trouble code?

To fix B1988: Check the integrity of the wiring harness. Check the resistance and voltage at the pedal position sensor. Inspect contacts for oxidation. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1988?

Limited driving only, diagnose soon

How much does it cost to fix B1988?

The estimated repair cost for B1988 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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