OBD Guide
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B2730

Back Over-Temp Detected

B2730 is an OBD-II diagnostic trouble code meaning: Back Over-Temp Detected. Common causes: clogged catalytic converter, brake caliper jamming. Estimated repair cost: $56–333.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–333 (est.)

Symptoms

  • Burning smell from the back of the car
  • Reduced engine power
  • Overheating of rear brake discs

Causes

  • Clogged catalytic converter
  • Brake caliper jamming
  • Temperature sensor malfunction
  • Problems with the cooling system

How to Fix

  1. Check the condition of the catalytic converter
  2. Diagnose the brake system for jamming
  3. Check temperature sensors and their connections
  4. Troubleshoot the cooling system

Related codes

P0420P0300P0172

FAQ

What does the B2730 code mean?

B2730 is an OBD-II diagnostic trouble code that indicates: Back Over-Temp Detected

What causes a B2730 error code?

The most common causes of B2730 include: Clogged catalytic converter; Brake caliper jamming; Temperature sensor malfunction; Problems with the cooling system.

How do I fix a B2730 diagnostic trouble code?

To fix B2730: Check the condition of the catalytic converter. Diagnose the brake system for jamming. Check temperature sensors and their connections. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2730?

Limited driving only, diagnose soon

How much does it cost to fix B2730?

The estimated repair cost for B2730 is $56–333. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat