P0786

What it means

Shift timing solenoid A is electrically intact, but the actual shift time does not match the model — shifts too fast (harsh) or too slow (slipping under load). Often aged solenoid with weakened force or contaminated ATF restricting the regulating port.

Is it safe to drive?

This code points to a problem that can cause damage or affect safety. Avoid driving and have the vehicle diagnosed promptly.

Most likely causes

• Aged solenoid with weakened magnetic force

  high

  One of the most commonly reported causes for this code — check this first.

• Old, contaminated transmission fluid

  medium

  A plausible cause — test and verify before replacing parts.

• Sensor element aged beyond calibration window

  low

  Less common, but worth ruling out after the more likely causes.

Related help

• Full P0786 diagnosis, causes & costs
• How to read check engine light codes
• Is it safe to drive with the light on?