Power Liftgate Module Module No Response
The U0678 code means the vehicle's onboard diagnostic system has detected: Power Liftgate Module Module No Response. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $200 - $800
Network codes mean modules are not communicating. You need a scanner that reads all systems to find the problem.
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Common Symptoms
- Power liftgate not opening or closing
- Liftgate opening partially then stopping
- Beeping when liftgate activated
- Liftgate button unresponsive
Probable Causes (Ranked by Likelihood)
- Liftgate strut motor failure Very High
- Latch assembly fault High
- Pinch sensor malfunction Moderate
- Module communication fault Low
Step-by-Step Diagnostic Procedure
-
Test liftgate struts for proper operation
-
Check latch mechanism for binding
-
Inspect pinch sensors along liftgate edge
-
Verify module power, ground, and communication
Frequently Asked Questions
Can I drive with U0678?
Check the severity. If it affects safety systems like stability control or braking, limit driving to short distances. Comfort features like heaters or parking assist are safe to drive with.
What causes U0678?
Most commonly a faulty power liftgate module or damaged wiring in the communication circuit to that module.
How much does it cost to fix U0678?
Typical repair costs range from $200 - $800 depending on whether the module or just wiring needs repair.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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