P0786 moderate

Shift Timing Solenoid Range/Performance

The P0786 code means the vehicle's onboard diagnostic system has detected: Shift Timing Solenoid Range/Performance. This is a moderate severity code.

My Garage →

Keep driving?: Short distances only
DIY difficulty: hard
Estimated cost: $150 - $600 (parts and labor)

Check Your Fluid First

ANCEL AD310 OBD-II Scanner

Read and clear transmission codes. Many trans codes are caused by low or burnt fluid -- check level and color before assuming the worst.

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Read Transmission Codes

LAUNCH CRP123X (Reads All Systems)

Basic scanners only read engine codes. This reads transmission, ABS, and airbag too.

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Common Symptoms

Check Engine Light illuminated
Shift timing inconsistent
Soft or delayed shifts
Transmission may hunt between gears

Probable Causes (Ranked by Likelihood)

Degraded shift timing solenoid Very High
Contaminated fluid reducing solenoid response High
Valve body wear affecting timing circuit Moderate
TCM calibration issue Low

Step-by-Step Diagnostic Procedure

Monitor shift timing against TCM commands
Check solenoid response time using scan tool data
Inspect transmission fluid condition
Check for TCM software updates
Replace the shift timing solenoid if response is degraded

Frequently Asked Questions

Can I drive with code P0786?

Drive short distances only. Shift malfunction codes indicate the transmission is not shifting correctly, which can cause further damage.

What does P0786 mean?

Shift Timing Solenoid Range/Performance. This means the TCM has detected that a shift event is not occurring as expected. The cause can range from a faulty solenoid to internal transmission wear.

Will a transmission flush fix P0786?

A fluid flush alone rarely fixes shift malfunction codes. However, if the fluid is contaminated, a flush combined with solenoid replacement may resolve the issue. Never flush a transmission with heavily burnt fluid, as it can dislodge debris and cause further damage.