OBD Guide
ENFRDEESPT

B1172

Front Door Lock-Link Switch Left Unlock Circuit Malfunction

B1172 is an OBD-II diagnostic trouble code meaning: Front Door Lock-Link Switch Left Unlock Circuit Malfunction. Common causes: open or short circuit in wiring harness, door lock solenoid malfunction. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • The door does not unlock when the button is pressed
  • Periodic failures of the unlocking system
  • Delayed central locking

Causes

  • Open or short circuit in wiring harness
  • Door lock solenoid malfunction
  • Oxidized or damaged contacts
  • Problems with the control module

How to Fix

  1. Checking the integrity of the door wiring harness
  2. Testing the performance of the lock solenoid
  3. Cleaning or replacing connector pins
  4. Diagnostics and replacement of the control module if necessary

Related codes

B1171B1173B1174

FAQ

What does the B1172 code mean?

B1172 is an OBD-II diagnostic trouble code that indicates: Front Door Lock-Link Switch Left Unlock Circuit Malfunction

What causes a B1172 error code?

The most common causes of B1172 include: Open or short circuit in wiring harness; Door lock solenoid malfunction; Oxidized or damaged contacts; Problems with the control module.

How do I fix a B1172 diagnostic trouble code?

To fix B1172: Checking the integrity of the door wiring harness. Testing the performance of the lock solenoid. Cleaning or replacing connector pins. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1172?

Yes, but get it checked soon

How much does it cost to fix B1172?

The estimated repair cost for B1172 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat