GM OBD Trouble Code 28
Auto Transmission Range Pressure Switch Error
The Auto Transmission Range Pressure switch is generally located inside the transmission, attached to the valve body. This switch uses hydraulic pressure to signal the ECM as to which gear the transmission is in.
Fault Code Description
- 28 - Auto Transmission Range Pressure switch error
Symptoms
- No symptoms may be noted or the transmission could shift erratically
Common Problems
- A failed Transmission Range Pressure switch is the most common cause for a code 28
Related Questions
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How much does a transmission valve body cost? and where can i get one?
How much does a transmission valve body cost? and where can i get one?