OBD Guide
ENFRDEESPT

B2788

IG2 Signal Malfunction

B2788 is an OBD-II diagnostic trouble code meaning: IG2 Signal Malfunction. Common causes: open or short circuit in wiring harness, ignition relay malfunction. Estimated repair cost: $56–167.

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

Symptoms

  • Problems starting the engine
  • Unstable engine operation
  • Check Engine Light Is On
  • Disabling security systems

Causes

  • Open or short circuit in wiring harness
  • Ignition relay malfunction
  • Problems with the ignition switch
  • Engine control unit (ECU) malfunction

How to Fix

  1. Check wiring harness for damage
  2. Check ignition relay
  3. Check the ignition switch
  4. Check engine control unit (ECU)

Related codes

B2787B2789P0351P0352

FAQ

What does the B2788 code mean?

B2788 is an OBD-II diagnostic trouble code that indicates: IG2 Signal Malfunction

What causes a B2788 error code?

The most common causes of B2788 include: Open or short circuit in wiring harness; Ignition relay malfunction; Problems with the ignition switch; Engine control unit (ECU) malfunction.

How do I fix a B2788 diagnostic trouble code?

To fix B2788: Check wiring harness for damage. Check ignition relay. Check the ignition switch. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2788?

Limited driving only, diagnose soon

How much does it cost to fix B2788?

The estimated repair cost for B2788 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat