OBD Guide
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B1981

Memory Off Switch Circuit Short to Battery

B1981 is an OBD-II diagnostic trouble code meaning: Memory Off Switch Circuit Short to Battery. Common causes: wiring harness damage, memory switch failure. Estimated repair cost: $56–167.

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

Symptoms

  • Inability to save memory settings
  • Battery discharge when parked for a long time
  • Incorrect operation of electrical equipment

Causes

  • Wiring harness damage
  • Memory switch failure
  • Short circuit in power supply
  • Contact corrosion

How to Fix

  1. Check the integrity of the wiring harness in the memory switch area
  2. Check resistance and voltage at memory switch
  3. Replace faulty memory switch if necessary
  4. Eliminate short circuit in the circuit

Related codes

B1980B1982U0155

FAQ

What does the B1981 code mean?

B1981 is an OBD-II diagnostic trouble code that indicates: Memory Off Switch Circuit Short to Battery

What causes a B1981 error code?

The most common causes of B1981 include: Wiring harness damage; Memory switch failure; Short circuit in power supply; Contact corrosion.

How do I fix a B1981 diagnostic trouble code?

To fix B1981: Check the integrity of the wiring harness in the memory switch area. Check resistance and voltage at memory switch. Replace faulty memory switch if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1981?

Limited driving only, diagnose soon

How much does it cost to fix B1981?

The estimated repair cost for B1981 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat