OBD-II Code · Powertrain
P0758
Powertrain Diagnostic Code (P0758)
See deep dive below for full diagnostic context.
Common symptoms
- CEL
Likely causes
- See deep dive
Where to start
- Try the cheapest cause first. Start by checking: see deep dive.
- Cost & scope. $50-$2,000
- If the code returns after the fix: escalate to a shop or scanner with live-data and freeze-frame. A code that re-sets means the underlying fault is still there.
Read the full diagnostic procedure
P0758 is the electrical fault on shift solenoid B circuit — the TCM commanded the solenoid and saw an open, short to ground, or short to power on the driver. Cheapest-first ladder: measure shift solenoid B resistance at the case connector against the FSM spec (most on/off shift solenoids run 20-30 ohms, PWM types 10-15 ohms); inspect the internal pass-through harness for fluid intrusion and pin corrosion; verify the TCM driver is not damaged by checking voltage at the connector with key on; replace the solenoid only after the wiring is confirmed clean. Caveat: a P0758 paired with multiple other shift solenoid electrical codes is almost always an internal harness failure, not three independent solenoid failures.
Vehicle-specific patterns
Vehicle-specific patterns: 1996-2005 GM trucks with the 4L60E and 4L80E set P0758 from the well-documented case connector D corrosion and fluid wicking pattern, repaired with the updated connector pigtail. 2004-2010 Ford F-150 with the 5R110W sets P0758 from internal wiring harness failure that Ford addressed with a redesigned service kit. 2007-2013 Jeep Wrangler with the 42RLE sets P0758 from solenoid pack failure that is replaced as an assembly. 2008-2014 Cadillac CTS with the 6L50 sets P0758 alongside other 6L family codes when valve body wear cascades into solenoid driver faults. Estimated repair: $200 to $1,300.
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