OBD Guide
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U1240

AV Switch Connection

U1240 is an OBD-II diagnostic trouble code meaning: AV Switch Connection. Common causes: av switch malfunction, wiring harness damage. Estimated repair cost: $6–56.

Severity
✅ Low
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$6–56 (est.)

Symptoms

  • Multimedia system malfunction
  • Lost sound or picture
  • Spontaneous system shutdown
  • Interface glitches or freezes

Causes

  • AV switch malfunction
  • Wiring harness damage
  • Oxidation of contacts in connectors
  • Media module software error
  • Module power problems

How to Fix

  1. Check the connections of the AV switch connectors
  2. Inspect the wiring harness for damage
  3. Measure the module supply voltage
  4. Test the operation of the AV switch
  5. Update multimedia system software

Related codes

U1230U1245

FAQ

What does the U1240 code mean?

U1240 is an OBD-II diagnostic trouble code that indicates: AV Switch Connection

What causes a U1240 error code?

The most common causes of U1240 include: AV switch malfunction; Wiring harness damage; Oxidation of contacts in connectors; Media module software error.

How do I fix a U1240 diagnostic trouble code?

To fix U1240: Check the connections of the AV switch connectors. Inspect the wiring harness for damage. Measure the module supply voltage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U1240?

Yes, but get it checked soon

How much does it cost to fix U1240?

The estimated repair cost for U1240 is $6–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat