OBD Guide
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B1378

Oil Change Lamp Circuit Short To Ground

B1378 is an OBD-II diagnostic trouble code meaning: Oil Change Lamp Circuit Short To Ground. Common causes: wiring harness damage, oil change lamp malfunction. Estimated repair cost: $11–56.

Severity
✅ Low
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$11–56 (est.)

Symptoms

  • The oil change light comes on unnecessarily
  • Oil change light does not light up when needed
  • Incorrect readings on the dashboard

Causes

  • Wiring harness damage
  • Oil change lamp malfunction
  • Problems in the control module
  • Short circuit in the circuit

How to Fix

  1. Check the integrity of the wiring harness
  2. Check oil change lamp
  3. Diagnose the control module
  4. Eliminate short circuit in the circuit

Related codes

B1377B1379

FAQ

What does the B1378 code mean?

B1378 is an OBD-II diagnostic trouble code that indicates: Oil Change Lamp Circuit Short To Ground

What causes a B1378 error code?

The most common causes of B1378 include: Wiring harness damage; Oil change lamp malfunction; Problems in the control module; Short circuit in the circuit.

How do I fix a B1378 diagnostic trouble code?

To fix B1378: Check the integrity of the wiring harness. Check oil change lamp. Diagnose the control module. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1378?

Yes, but get it checked soon

How much does it cost to fix B1378?

The estimated repair cost for B1378 is $11–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat