OBD Guide
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B2789

No Response From ID BOX

B2789 is an OBD-II diagnostic trouble code meaning: No Response From ID BOX. Common causes: id box malfunction, broken or damaged wiring harness. Estimated repair cost: $111–333.

Severity
🔴 High
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$111–333 (est.)

Symptoms

  • Engine won't start
  • Check Engine Light Is On
  • Immobilizer activated
  • The car goes into emergency mode

Causes

  • ID BOX malfunction
  • Broken or damaged wiring harness
  • Poor contact in connectors
  • ECU software failure
  • Key reader antenna malfunction

How to Fix

  1. Check the integrity of the wiring harness between the ECU and ID BOX
  2. Inspect and clean the connectors, make sure the connections are secure
  3. Check the power and ground of the ID BOX
  4. Diagnostics of the ID BOX unit for malfunctions
  5. If necessary, replace the ID BOX or reader antenna
  6. Update or reflash the ECU software

Related codes

B2790B2791P0513

FAQ

What does the B2789 code mean?

B2789 is an OBD-II diagnostic trouble code that indicates: No Response From ID BOX

What causes a B2789 error code?

The most common causes of B2789 include: ID BOX malfunction; Broken or damaged wiring harness; Poor contact in connectors; ECU software failure.

How do I fix a B2789 diagnostic trouble code?

To fix B2789: Check the integrity of the wiring harness between the ECU and ID BOX. Inspect and clean the connectors, make sure the connections are secure. Check the power and ground of the ID BOX. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2789?

Yes, but get it checked soon

How much does it cost to fix B2789?

The estimated repair cost for B2789 is $111–333. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat