OBD Guide
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B273A

Hill Descent Control Switch

B273A is an OBD-II diagnostic trouble code meaning: Hill Descent Control Switch. Common causes: hill descent control switch malfunction, wiring harness damage. Estimated repair cost: $56–167.

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

Symptoms

  • Inability to activate hill descent assist
  • Fault indication on the dashboard
  • Downhill assist system is unstable

Causes

  • Hill Descent Control switch malfunction
  • Wiring harness damage
  • Problems with the system control module
  • Software glitch

How to Fix

  1. Check the Hill Descent Control switch for mechanical damage
  2. Check the integrity of the wiring harness and connections
  3. Diagnose the system control module
  4. If necessary, replace the switch or control module
  5. Update control module software

Related codes

B273BB273CC1234

FAQ

What does the B273A code mean?

B273A is an OBD-II diagnostic trouble code that indicates: Hill Descent Control Switch

What causes a B273A error code?

The most common causes of B273A include: Hill Descent Control switch malfunction; Wiring harness damage; Problems with the system control module; Software glitch.

How do I fix a B273A diagnostic trouble code?

To fix B273A: Check the Hill Descent Control switch for mechanical damage. Check the integrity of the wiring harness and connections. Diagnose the system control module. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B273A?

Limited driving only, diagnose soon

How much does it cost to fix B273A?

The estimated repair cost for B273A is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat