OBD Guide
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B1629

PRNDL Reverse Input Short To Battery

B1629 is an OBD-II diagnostic trouble code meaning: PRNDL Reverse Input Short To Battery. Common causes: wiring harness damage, oxidation of contacts in connectors. Estimated repair cost: $56–167.

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

Symptoms

  • Incorrect display of gear selector position on the instrument panel
  • Gear shifting problems
  • Activating emergency transmission mode
  • Parking sensors or rear view camera do not work

Causes

  • Wiring harness damage
  • Oxidation of contacts in connectors
  • Gear selector malfunction
  • Short circuit in the circuit
  • Problems with the transmission control unit

How to Fix

  1. Check the condition of the wiring harness for damage
  2. Inspect and clean the contacts in the gear selector connectors
  3. Check reverse circuit resistance
  4. Test the operation of the gear selector
  5. If necessary, replace faulty components

Related codes

B1628B1630P0705

FAQ

What does the B1629 code mean?

B1629 is an OBD-II diagnostic trouble code that indicates: PRNDL Reverse Input Short To Battery

What causes a B1629 error code?

The most common causes of B1629 include: Wiring harness damage; Oxidation of contacts in connectors; Gear selector malfunction; Short circuit in the circuit.

How do I fix a B1629 diagnostic trouble code?

To fix B1629: Check the condition of the wiring harness for damage. Inspect and clean the contacts in the gear selector connectors. Check reverse circuit resistance. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1629?

Limited driving only, diagnose soon

How much does it cost to fix B1629?

The estimated repair cost for B1629 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat