OBD Guide
ENFRDEESPT

B1621

Wiper Rear Low Limit Input Circuit Short To Battery

B1621 is an OBD-II diagnostic trouble code meaning: Wiper Rear Low Limit Input Circuit Short To Battery. Common causes: damage to wire insulation in the harness, short circuit in rear wiper relay. Estimated repair cost: $33–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • Incorrect operation of the rear windshield wiper
  • Rear wiper does not work
  • Rear wiper constantly moves without command

Causes

  • Damage to wire insulation in the harness
  • Short circuit in rear wiper relay
  • Malfunction of the windshield wiper control unit
  • Damage to the wiring harness in the rear door area

How to Fix

  1. Check the integrity of the rear wiper wiring harness
  2. Measure circuit resistance for short circuit
  3. Check the serviceability of the rear wiper relay
  4. Check the operation of the windshield wiper control unit
  5. Replace damaged wires or components

Related codes

B1620B1622B1623

FAQ

What does the B1621 code mean?

B1621 is an OBD-II diagnostic trouble code that indicates: Wiper Rear Low Limit Input Circuit Short To Battery

What causes a B1621 error code?

The most common causes of B1621 include: Damage to wire insulation in the harness; Short circuit in rear wiper relay; Malfunction of the windshield wiper control unit; Damage to the wiring harness in the rear door area.

How do I fix a B1621 diagnostic trouble code?

To fix B1621: Check the integrity of the rear wiper wiring harness. Measure circuit resistance for short circuit. Check the serviceability of the rear wiper relay. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1621?

Limited driving only, diagnose soon

How much does it cost to fix B1621?

The estimated repair cost for B1621 is $33–167. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat