OBD Guide
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B2443

Powertrain Performance Mode Switch Circuit failure

B2443 is an OBD-II diagnostic trouble code meaning: Powertrain Performance Mode Switch Circuit failure. Common causes: open or short circuit in switch circuit, mode switch malfunction. Estimated repair cost: $56–167.

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

Symptoms

  • Engine transition to emergency mode
  • Inability to switch operating modes
  • Check Engine Light Illuminates
  • Reduced engine efficiency

Causes

  • Open or short circuit in switch circuit
  • Mode switch malfunction
  • Wiring harness damage
  • Contact problems or corrosion
  • Engine control unit (ECU) malfunction

How to Fix

  1. Check the integrity of the mode switch circuit
  2. Inspect the switch contacts for corrosion or damage.
  3. Check the wiring harness for damage
  4. Replace the mode switch if necessary
  5. Check and, if necessary, replace the engine control unit (ECU)

Related codes

P0700P0701P0702

FAQ

What does the B2443 code mean?

B2443 is an OBD-II diagnostic trouble code that indicates: Powertrain Performance Mode Switch Circuit failure

What causes a B2443 error code?

The most common causes of B2443 include: Open or short circuit in switch circuit; Mode switch malfunction; Wiring harness damage; Contact problems or corrosion.

How do I fix a B2443 diagnostic trouble code?

To fix B2443: Check the integrity of the mode switch circuit. Inspect the switch contacts for corrosion or damage.. Check the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2443?

Limited driving only, diagnose soon

How much does it cost to fix B2443?

The estimated repair cost for B2443 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat