B2240: Liftgate Reset Switch Circuit Short to Ground
The B2240 code indicates that the liftgate control module has detected a short to ground in the reset switch circuit. This means the module sees the reset button as constantly pressed, or the wiring has a direct path to chassis ground, preventing normal automatic open/close operation.
1. Commonly Affected Makes
2. Most Common Causes
- Stuck or internally damaged liftgate reset switch
- Wiring to the reset switch pinched, chafed, or shorted to ground
- Corroded or bent terminals at the switch or liftgate module connector
- Faulty liftgate control module
3. Symptoms You Will Notice
- Liftgate does not open or close automatically
- Reset button appears unresponsive or stuck
4. Step-by-Step Diagnosis
Scan for additional codes and verify B2240 is present
Visually inspect the reset switch and wiring for damage or corrosion
Test the reset switch circuit for continuity to ground with a multimeter
Check connector terminals for corrosion or bent pins
If wiring and switch are good, test the liftgate control module
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, the vehicle is generally safe to drive, but the liftgate may not operate automatically. Manual operation might still be possible.
How much does it cost to fix?▼
Repair costs typically range from $100 to $400, depending on whether the switch, wiring, or module needs replacement.