P0785

Shift Timing Solenoid A

Q: Is it safe to drive with P0785?

Short trips are usually fine, but poorly timed or harsh shifts add heat and wear, so repair it soon.

Q: Can I just clear P0785?

You can, but if the solenoid, fluid, or wiring is at fault the shift-timing problem and the code will return.

Transmission Generic OBD-II Medium

What it means

P0785 means the transmission control module has detected a fault in the shift/timing solenoid A circuit. This solenoid helps control when and how firmly the transmission shifts, so a fault leads to harsh or poorly timed shifts and can trigger limp mode. Common causes are the solenoid, its wiring, or low or contaminated fluid.

Medium

Can I keep driving? Usually drivable, but expect harsh or poorly timed shifts and possible limp mode — repair soon to avoid transmission wear.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Harsh, slipping, or poorly timed shifts
Transmission shifts improperly or not at all
Transmission may drop into limp mode
Reduced fuel economy
Check-engine light on

Common causes

Most likely first

Faulty shift/timing solenoid ALikely
Damaged wiring or corroded connectors in the solenoid circuitCommon
Low or contaminated transmission fluidCommon
Sticking valve body from debris in the fluidLess often
Failed transmission control module (TCM)Less often

How to diagnose & fix

Work through it in order

Check transmission fluid level and condition; correct if low, dirty, or burnt.
Read freeze-frame data and inspect the solenoid connector and wiring for damage or corrosion.
Measure the solenoid's resistance against spec and test its circuit; replace if out of range.
If wiring and solenoid check out, inspect the valve body for sticking.
Clear the code and road-test; suspect the TCM only after the above pass.

FAQ

Quick answers

Is it safe to drive with P0785?+

Short trips are usually fine, but poorly timed or harsh shifts add heat and wear, so repair it soon.

Can I just clear P0785?+

You can, but if the solenoid, fluid, or wiring is at fault the shift-timing problem and the code will return.

Read & clear P0785 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX