What Does B2568 Mean?
This diagnostic trouble code indicates that the Body Control Module (BCM) has detected a short to ground in the electrical circuit controlling the reverse mirror tilt function. When the vehicle is shifted into reverse, many vehicles automatically tilt the passenger-side mirror downward to aid in parking visibility. The BCM detected that the output circuit voltage dropped to ground level when it should have maintained normal operating voltage, indicating an electrical fault in the mirror motor, wiring, or related connectors.
Common Causes
35%
Damaged or chafed wiring between BCM and mirror assembly causing short to ground
30%
Failed mirror motor or internal short within the mirror actuator assembly
20%
Corroded or moisture-damaged mirror connector causing intermittent ground fault
10%
Failed BCM output driver circuit for mirror control
5%
Pinched wiring in door hinge area from repeated opening/closing
Diagnostic Steps
1
Step 1: Visually inspect the mirror wiring harness from the door jamb through the door, checking for obvious damage, chafing, or pinched wires. Pay special attention to the door hinge area where wires flex repeatedly.
2
Step 2: Disconnect the mirror connector and use a digital multimeter to measure resistance between the mirror motor control circuit pins and ground. Expected reading should be infinite resistance (OL); any continuity indicates a short to ground in the mirror assembly.
3
Step 3: With mirror disconnected, check resistance from the BCM-side connector mirror control circuit to ground. If continuity exists, the short is in the wiring harness between BCM and mirror; if no continuity, the mirror assembly is likely faulty.
4
Step 4: If wiring tests good, reconnect mirror and use a multimeter to measure voltage at the mirror connector while shifting into reverse. BCM should provide 9-14V on control circuit; if voltage immediately drops to zero or BCM shuts down output, confirm internal mirror motor short.
5
Step 5: Repair or replace identified faulty component (wiring, connector, or mirror assembly), clear codes, and perform functional test by shifting into reverse multiple times to verify mirror operation and confirm code does not return.
Estimated Repair Cost
$150 - $650
Parts + labor, varies by vehicle and location
This diagnostic trouble code indicates that the Body Control Module (BCM) has detected a short to ground in the electrical circuit controlling the reverse mirror tilt function. When the vehicle is shifted into reverse, many vehicles automatically tilt the passenger-side mirror downward to aid in par...
The most common cause of B2568 (Reverse Mirror Output Circuit Short to Ground) is: Damaged or chafed wiring between BCM and mirror assembly causing short to ground
Typical repair costs for B2568 range from $150 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
This is safe to drive as it only affects the automatic mirror tilt feature when reversing. The mirrors will still function normally for manual adjustment and standard driving visibility. Repair can be scheduled at convenience, though the convenience feature will be inoperative until fixed.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B2568 to identify the root cause.
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Quick Info
Category
Body
System
Body Control System / Mirror Control
Difficulty
Type
Generic (SAE)
Recommended Tools
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