What Does B2558 Mean?
This code indicates the Body Control Module (BCM) has detected an abnormal voltage condition in the right power sliding door motor control circuit. Specifically, the output circuit that commands the door open/close motor is experiencing a short to battery voltage (12V+) when it should be at a lower voltage or ground. This prevents the BCM from properly controlling the sliding door operation and triggers a fault to protect the circuit from damage.
Common Causes
45%
Damaged or chafed wiring harness in the door jamb area causing short to power
30%
Failed power sliding door motor module with internal short circuit
15%
Corroded or damaged connector pins at door motor creating intermittent short
10%
Faulty Body Control Module with damaged output driver circuit
Diagnostic Steps
1
Step 1: Perform visual inspection of the right sliding door wiring harness from BCM to door motor, paying special attention to the door jamb flex area where wires repeatedly bend. Look for damaged insulation, chafing, pinched wires, or signs of heat damage.
2
Step 2: Disconnect the right power sliding door motor connector. Using a digital multimeter, measure voltage on the BCM-side motor control output wire with ignition on. Reading should be 0-1V with door command inactive. If 12V+ is present, wiring has short to power between BCM and connector.
3
Step 3: With motor disconnected, measure resistance between the motor control output circuit wire and battery positive at multiple points along the harness. Any reading below 10K ohms indicates a short to power in the harness requiring repair or replacement.
4
Step 4: If harness tests good, inspect motor connector terminals for corrosion, bent pins, or moisture intrusion. Check motor assembly ground connection integrity with resistance test to body ground (should be less than 1 ohm).
5
Step 5: If all wiring and connectors test normal, perform motor assembly bench test by applying controlled voltage to motor terminals. Motor should operate smoothly without binding or excessive current draw (typically 5-15A depending on vehicle). Replace motor if faulty.
6
Step 6: After repairs, clear codes, cycle the door through complete open/close operations multiple times while monitoring live data for proper voltage levels and confirm code does not return.
Estimated Repair Cost
$150 - $850
Parts + labor, varies by vehicle and location
This code indicates the Body Control Module (BCM) has detected an abnormal voltage condition in the right power sliding door motor control circuit. Specifically, the output circuit that commands the door open/close motor is experiencing a short to battery voltage (12V+) when it should be at a lower ...
The most common cause of B2558 (Right Power Sliding Door Open/Close Output Circuit Short to Battery) is: Damaged or chafed wiring harness in the door jamb area causing short to power
Typical repair costs for B2558 range from $150 to $850, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive, but the right power sliding door will not operate automatically and may need to be manually closed/latched. This creates a potential safety risk if the door is not properly secured before driving, especially with passengers. Repair within 1-2 weeks to restore proper door function.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B2558 to identify the root cause.
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Quick Info
Category
Body
System
Body Control and Convenience Systems
Difficulty
Type
Generic (SAE)
Recommended Tools
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