Body
Generic/SAE
OBD-II Fault Code
B2557: Left Power Sliding Door Open/Close Output Circuit Short to Battery
Meaning, symptoms, likely causes, diagnostic checks and repair guidance for B2557.
Body access / door
Use this category to narrow your checks before replacing parts.
Low
Severity is a general guide. Confirm with scan-tool data and vehicle symptoms.
What B2557 usually means
Left Power Sliding Door Open/Close Output Circuit Short to Battery.
Common symptoms
Body/accessory warning lamp or feature not working
Likely causes
Faulty switch/actuator; Broken wiring in door hinge area; Blown fuse; Module coding/calibration issue; Open circuit; Disconnected connector; Broken wire; Failed component; Wire shorted to power feed; Incorrectly repaired harness; Internal component short
Diagnostic checks
Check related fuses, connectors, grounds and switch/module power supply; Check switch input, actuator output, fuse and door-jamb wiring; Check connector fitment and continuity from module to component; Check for unwanted voltage on signal/control circuit
Repair guidance
Repair broken wiring, replace failed switch/actuator, recalibrate if required; Repair open wire/connector or replace the failed component after continuity test; Repair harness short to power or replace internally shorted component
Verification after repair
Operate the affected body/accessory system and rescan