OBD Guide
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U1231

Invalid Or Missing Data For Electric Defrost

U1231 is an OBD-II diagnostic trouble code meaning: Invalid Or Missing Data For Electric Defrost. Common causes: problems in the heating power circuit, control module malfunction. Estimated repair cost: $17–89.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–89 (est.)

Symptoms

  • Heated glass does not work
  • Heating indicator flashes
  • The error persists after turning on the heating
  • Intermittent heating operation

Causes

  • Problems in the heating power circuit
  • Control module malfunction
  • Wiring harness damage
  • Software error in ECU
  • Short circuit in the system

How to Fix

  1. Check heating circuit fuses
  2. Diagnose the resistance of heating elements
  3. Check the integrity of the wiring harness
  4. Scan the control module for errors
  5. Update ECU firmware if necessary

Related codes

U1232U1230

FAQ

What does the U1231 code mean?

U1231 is an OBD-II diagnostic trouble code that indicates: Invalid Or Missing Data For Electric Defrost

What causes a U1231 error code?

The most common causes of U1231 include: Problems in the heating power circuit; Control module malfunction; Wiring harness damage; Software error in ECU.

How do I fix a U1231 diagnostic trouble code?

To fix U1231: Check heating circuit fuses. Diagnose the resistance of heating elements. Check the integrity of the wiring harness. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U1231?

Yes, but get it checked soon

How much does it cost to fix U1231?

The estimated repair cost for U1231 is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat