OBD Guide
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B2902

Rear Height Sensor Circuit

B2902 is an OBD-II diagnostic trouble code meaning: Rear Height Sensor Circuit. Common causes: open or short circuit in the sensor wiring harness, oxidation of sensor contacts or connector. Estimated repair cost: $56–167.

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

Symptoms

  • Incorrect suspension operation (too hard or soft)
  • The suspension fault light comes on
  • The car may roll when turning or braking
  • Uneven rear clearance

Causes

  • Open or short circuit in the sensor wiring harness
  • Oxidation of sensor contacts or connector
  • Height sensor malfunction
  • Problems with the suspension control unit
  • Mechanical damage to the sensor (shock, corrosion)

How to Fix

  1. Check the integrity of the sensor wiring harness
  2. Clean sensor connector contacts
  3. Check the sensor resistance (compare with the norm)
  4. Replace the height sensor if necessary
  5. Scan the suspension control module for other errors

Related codes

C1710C1711B2910

FAQ

What does the B2902 code mean?

B2902 is an OBD-II diagnostic trouble code that indicates: Rear Height Sensor Circuit

What causes a B2902 error code?

The most common causes of B2902 include: Open or short circuit in the sensor wiring harness; Oxidation of sensor contacts or connector; Height sensor malfunction; Problems with the suspension control unit.

How do I fix a B2902 diagnostic trouble code?

To fix B2902: Check the integrity of the sensor wiring harness. Clean sensor connector contacts. Check the sensor resistance (compare with the norm). For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2902?

Limited driving only, diagnose soon

How much does it cost to fix B2902?

The estimated repair cost for B2902 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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