Left Power Sliding Door Latch Open
The B0646 code means the vehicle's onboard diagnostic system has detected: Left Power Sliding Door Latch Open. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- hard
- Estimated cost
- $200 - $800 (parts and labor)
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Common Symptoms
- Left sliding door does not operate
- Left sliding door opens slowly
- Left sliding door reverses while closing
- Left sliding door makes grinding noise
Probable Causes (Ranked by Likelihood)
- Faulty left sliding door motor Very High
- Damaged door track or cable High
- Failed sliding door latch Moderate
- Sliding door control module error Low
Step-by-Step Diagnostic Procedure
-
Test left door motor with direct power
-
Inspect door track for debris or damage
-
Check left door latch operation
-
Scan door module for fault codes
Frequently Asked Questions
Why does my sliding door not close fully?
Common causes include track debris, a worn latch, damaged cable, or faulty close limit switch.
Can I operate the sliding door manually?
Yes, there is usually a manual override switch or handle that disables power operation and allows manual use.
Are sliding door repairs expensive?
Motor and cable replacements can range from $200-$800 due to the complexity of the door mechanism.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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