What Does P0758 Mean?
Shift Solenoid B in the automatic transmission has a general malfunction. The TCM has detected that the solenoid B circuit is not operating within its expected parameters, which can affect 2nd and 3rd gear shifts. This typically causes harsh or delayed shifting, slipping, or the transmission may default to a limp mode with limited gear selection.
Common Causes
35%
Failed shift solenoid B with internal electrical open or short circuit
25%
Wiring fault in the solenoid B circuit — open, short to ground, or short to power
20%
Contaminated or degraded transmission fluid causing solenoid valve malfunction
15%
Valve body wear or damage affecting solenoid B hydraulic circuit
5%
TCM internal failure or poor ground causing incorrect solenoid drive signal
Diagnostic Steps
1
Check for additional transmission codes; multiple solenoid codes may indicate a wiring harness or valve body issue rather than a single solenoid failure.
2
Measure shift solenoid B resistance at the transmission connector — compare to the manufacturer specification (typically 11-25 ohms).
3
Inspect the transmission external harness connector for corrosion, pushed-back pins, or fluid contamination.
4
Check transmission fluid level and condition; perform a fluid service if it is dark or has a burnt smell.
5
Command solenoid B on and off with a bi-directional scan tool to verify it clicks and operates correctly.
6
If solenoid tests fail, drop the pan and replace solenoid B along with the filter and fluid.
Estimated Repair Cost
$200 - $1,000
Parts + labor, varies by vehicle and location
Shift Solenoid B in the automatic transmission has a general malfunction. The TCM has detected that the solenoid B circuit is not operating within its expected parameters, which can affect 2nd and 3rd gear shifts. This typically causes harsh or delayed shifting, slipping, or the transmission may def...
The most common cause of P0758 (Shift Solenoid B Malfunction) is: Failed shift solenoid B with internal electrical open or short circuit
Typical repair costs for P0758 range from $200 to $1,000, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The vehicle may enter limp mode and restrict gear selection. Driving is possible at reduced speed, but continued driving without repair risks further transmission damage. Have it diagnosed promptly.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0758 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Automatic Transmission
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
