What Does P0759 Mean?
Shift Solenoid B is either performing outside its expected parameters or is mechanically stuck in the off position. The TCM detects that gear engagement controlled by solenoid B is not occurring as commanded, resulting in missed shifts or a single-gear condition. This commonly manifests as the transmission failing to shift into a particular gear or slipping during shifts.
Common Causes
35%
Shift solenoid B stuck closed due to contamination or internal mechanical failure
25%
Valve body bore wear or debris preventing solenoid B from moving the shift valve
20%
Contaminated transmission fluid with debris clogging the solenoid
15%
Internal transmission clutch pack wear causing incorrect ratio detection
5%
Wiring issue causing insufficient current to fully actuate solenoid B
Diagnostic Steps
1
Monitor solenoid B duty cycle and commanded vs. actual gear ratios in live data to confirm the solenoid is being commanded but not responding.
2
Check transmission fluid level and condition — low fluid or heavy contamination can prevent proper solenoid function.
3
Command solenoid B on/off with a bi-directional scan tool while listening for an audible click at the transmission.
4
Measure solenoid B resistance at the transmission connector; compare to specification (typically 11-25 ohms).
5
Drop the transmission pan and inspect for excessive clutch material debris, which would indicate internal damage beyond the solenoid.
6
Remove and inspect solenoid B for contamination or restricted flow; replace if stuck or out of spec.
Estimated Repair Cost
$200 - $1,200
Parts + labor, varies by vehicle and location
Shift Solenoid B is either performing outside its expected parameters or is mechanically stuck in the off position. The TCM detects that gear engagement controlled by solenoid B is not occurring as commanded, resulting in missed shifts or a single-gear condition. This commonly manifests as the trans...
The most common cause of P0759 (Shift Solenoid B Performance or Stuck Off/) is: Shift solenoid B stuck closed due to contamination or internal mechanical failure
Typical repair costs for P0759 range from $200 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Driving is possible but the vehicle may be stuck in a single gear or have severely degraded shifting. Avoid highway driving if the transmission cannot shift properly. Repair soon to prevent secondary damage.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0759 to identify the root cause.
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Quick Info
Category
Powertrain
System
Automatic Transmission
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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