OBD Guide
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B1434

Wiper Hi/Low Speed Relay Coil Circuit Failure

B1434 is an OBD-II diagnostic trouble code meaning: Wiper Hi/Low Speed Relay Coil Circuit Failure. Common causes: faulty wiper speed relay, open or short circuit in wiring harness. Estimated repair cost: $11–56.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$11–56 (est.)

Symptoms

  • Windshield wipers only operate at one speed
  • Windshield wipers do not turn on
  • Intermittent wiper operation

Causes

  • Faulty wiper speed relay
  • Open or short circuit in wiring harness
  • Relay control circuit problems
  • Corrosion of relay contacts

How to Fix

  1. Check the windshield wiper speed relay for malfunctions
  2. Inspect the wiring harness for damage
  3. Check the integrity of the relay control circuit
  4. Replace relay if necessary

Related codes

B1435B1436

FAQ

What does the B1434 code mean?

B1434 is an OBD-II diagnostic trouble code that indicates: Wiper Hi/Low Speed Relay Coil Circuit Failure

What causes a B1434 error code?

The most common causes of B1434 include: Faulty wiper speed relay; Open or short circuit in wiring harness; Relay control circuit problems; Corrosion of relay contacts.

How do I fix a B1434 diagnostic trouble code?

To fix B1434: Check the windshield wiper speed relay for malfunctions. Inspect the wiring harness for damage. Check the integrity of the relay control circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1434?

Limited driving only, diagnose soon

How much does it cost to fix B1434?

The estimated repair cost for B1434 is $11–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat