OBD Guide
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B18E3

Power Liftgate Front Zone Switch Circuit Low

B18E3 is an OBD-II diagnostic trouble code meaning: Power Liftgate Front Zone Switch Circuit Low. Common causes: malfunction of the front power rear door switch, open or short circuit in wiring harness. Estimated repair cost: $56–167.

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

Symptoms

  • Incorrect operation of the rear door electric drive
  • The rear door does not open/close automatically
  • Fault indicator flashing

Causes

  • Malfunction of the front power rear door switch
  • Open or short circuit in wiring harness
  • Poor contact in connectors
  • Power or grounding problems

How to Fix

  1. Check the condition of the front power rear door switch
  2. Inspect the wiring harness for damage
  3. Check contacts in connectors
  4. Check circuit power and grounding
  5. Replace faulty components

Related codes

B18E4B18E5

FAQ

What does the B18E3 code mean?

B18E3 is an OBD-II diagnostic trouble code that indicates: Power Liftgate Front Zone Switch Circuit Low

What causes a B18E3 error code?

The most common causes of B18E3 include: Malfunction of the front power rear door switch; Open or short circuit in wiring harness; Poor contact in connectors; Power or grounding problems.

How do I fix a B18E3 diagnostic trouble code?

To fix B18E3: Check the condition of the front power rear door switch. Inspect the wiring harness for damage. Check contacts in connectors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B18E3?

Limited driving only, diagnose soon

How much does it cost to fix B18E3?

The estimated repair cost for B18E3 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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