Shift Timing Solenoid Low
What does P0787 mean?
The P0787 code means the vehicle's onboard diagnostic system has detected: Shift Timing Solenoid Low. This is a moderate severity code.
Common Symptoms
- Check Engine Light illuminated
- Late or delayed shifts
- Transmission feels sluggish
- Reduced performance
Probable Causes (Ranked by Likelihood)
- Short to ground in timing solenoid circuit Very High
- Internally shorted timing solenoid High
- Corroded connector Moderate
- TCM driver circuit fault Low
Step-by-Step Diagnostic Procedure
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Measure timing solenoid resistance -- low reading indicates internal short
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Check signal wire for short to ground
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Inspect connector for corrosion
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Check wiring insulation for chafing
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Replace solenoid if internally shorted
Frequently Asked Questions
Can I drive with code P0787?
Drive short distances only. Shift malfunction codes indicate the transmission is not shifting correctly, which can cause further damage.
What does P0787 mean?
Shift Timing Solenoid Low. 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 P0787?
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.