What causes GM code 93?

Failed pressure control solenoid Open or shorted solenoid wiring Stuck pressure regulator valve Low fluid or clogged filter

How do I fix GM code 93?

Read codes with an ALDL scan tool Check fluid level and condition Test solenoid resistance at the trans connector Inspect the internal harness for rubs Check line pressure against spec if equipped Replace the solenoid or harness as tests show then retest

93 Transmission Pressure Control Solenoid Circuit Error

Q: What does GM code 93 mean?

GM code 93. Transmission Pressure Control Solenoid Circuit Error. Applies to 1993-1995 C/K trucks, Suburban, Caprice, Roadmaster with 4L60E.

Make: GM (1982-1995)
Category: Powertrain - Transmission
Severity: Check Engine Light
Applies to: 1993-1995 C/K trucks, Suburban, Caprice, Roadmaster with 4L60E

How to read it

Code 93 reads as 9 flashes, pause, 3 flashes on the check-engine light. Jump terminals A and B on the ALDL connector with the key off, then turn the key on with the engine off and count the check-engine flashes.

What does GM code 93 mean?

93. Transmission Pressure Control Solenoid Circuit Error. This code sets when your vehicle computer detects transmission pressure control solenoid circuit error.

Common causes of 93

Failed pressure control solenoid
Open or shorted solenoid wiring
Stuck pressure regulator valve
Low fluid or clogged filter

How to fix 93

Read codes with an ALDL scan tool
Check fluid level and condition
Test solenoid resistance at the trans connector
Inspect the internal harness for rubs
Check line pressure against spec if equipped
Replace the solenoid or harness as tests show then retest