OBD Guide
ENFRDEESPT

C1581

Assist Map Number Un-Writing

C1581 is an OBD-II diagnostic trouble code meaning: Assist Map Number Un-Writing. Common causes: problems with the srs wiring harness, srs control unit malfunction. Estimated repair cost: $111–333.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$111–333 (est.)

Symptoms

  • SRS/airbag indicator is on
  • The passive safety system does not work during testing
  • The error is read by the OBD-II scanner, but there are no obvious symptoms

Causes

  • Problems with the SRS wiring harness
  • SRS control unit malfunction
  • Data corruption in block memory
  • Error when updating unit software

How to Fix

  1. Check fault codes with a scanner
  2. Check SRS wiring harness and connectors
  3. Try to rewrite the help card using dealer equipment
  4. If necessary, replace the SRS control unit

Related codes

B0001B1000C1500

FAQ

What does the C1581 code mean?

C1581 is an OBD-II diagnostic trouble code that indicates: Assist Map Number Un-Writing

What causes a C1581 error code?

The most common causes of C1581 include: Problems with the SRS wiring harness; SRS control unit malfunction; Data corruption in block memory; Error when updating unit software.

How do I fix a C1581 diagnostic trouble code?

To fix C1581: Check fault codes with a scanner. Check SRS wiring harness and connectors. Try to rewrite the help card using dealer equipment. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1581?

Do not drive — repair immediately

How much does it cost to fix C1581?

The estimated repair cost for C1581 is $111–333. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat