Error code
OBD2 P0959
OBD2P0959
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Auto Shift Manual Mode Circuit Intermittent.
Severity
moderateCan drive but may experience shifting issues.
Summary
P0959 indicates an intermittent malfunction in the Auto Shift Manual (ASM) mode circuit, which is related to the transmission control system.
Common Causes
- Poor wiring connection
- Faulty ECM/PCM/TCM
Fixes
- Repair or replace faulty wiring and connectors, check TCM for errors.
FAQ
What does P0959 mean?
P0959 indicates an issue with the ASM mode circuit in your transmission control system.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
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