OBD Guide
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B2420

Power Liftgate/Trunk Sensor 2 Invalid

B2420 is an OBD-II diagnostic trouble code meaning: Power Liftgate/Trunk Sensor 2 Invalid. Common causes: position/force sensor malfunction, open or shorted wiring harness. Estimated repair cost: $56–167.

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

Symptoms

  • Inoperative electric trunk drive
  • Intermittent drive operation
  • Malfunction indicator light comes on

Causes

  • Position/force sensor malfunction
  • Open or shorted wiring harness
  • Drive control module problems
  • Mechanical damage to drive components

How to Fix

  1. Check the integrity of the wiring harness to the sensor
  2. Test the sensor to specifications
  3. Check the operation of the control module
  4. If necessary, replace the sensor or other components
  5. Perform drive system calibration

Related codes

B2421B2422B2423

FAQ

What does the B2420 code mean?

B2420 is an OBD-II diagnostic trouble code that indicates: Power Liftgate/Trunk Sensor 2 Invalid

What causes a B2420 error code?

The most common causes of B2420 include: Position/force sensor malfunction; Open or shorted wiring harness; Drive control module problems; Mechanical damage to drive components.

How do I fix a B2420 diagnostic trouble code?

To fix B2420: Check the integrity of the wiring harness to the sensor. Test the sensor to specifications. Check the operation of the control module. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2420?

Limited driving only, diagnose soon

How much does it cost to fix B2420?

The estimated repair cost for B2420 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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