P0746

Pressure Control Solenoid A Performance/Stuck Off

Q: Is it safe to drive with P0746?

Short trips are usually fine, but low line pressure lets clutches slip, which overheats and wears the transmission — get it fixed before it worsens.

Q: Can I just clear P0746?

You can, but it returns once the solenoid or pressure fault reappears. Check the fluid and solenoid rather than only clearing it.

Transmission — line pressure control Generic OBD-II Medium

What it means

P0746 means the transmission's "A" pressure control (EPC) solenoid isn't regulating line pressure the way the control module expects — it reads as stuck off or under-performing. Line pressure sets how firmly the clutches and bands apply, so you may notice soft, slipping, or harsh shifts. It won't stop the engine from starting, but sustained slipping can wear the transmission.

Medium

Can I keep driving? Usually driveable, but soft or slipping shifts from low line pressure can wear the transmission over time — have it checked soon.

Real-world scan data

Seen in

213

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

Soft, delayed, or slipping shifts
Harsh or erratic shifting under load
Transmission may drop into limp mode (fixed gear)
Check-engine light on
Transmission running hotter than normal in heavy use

Common causes

Most likely first

Stuck or failed pressure control (EPC) solenoid ALikely
Low, dirty, or contaminated transmission fluidCommon
Damaged wiring or corroded connector in the solenoid circuitCommon
Valve body wear or debris holding the solenoid offLess often
Failed transmission control module (rare)Less often

How to diagnose & fix

Work through it in order

Read freeze-frame data and note any other transmission codes stored with it.
Check transmission fluid level and condition; top up or service if it is low, dirty, or smells burnt.
Inspect the solenoid wiring and connector for damage, corrosion, or looseness.
Measure the pressure control solenoid's resistance and command it with a scan tool; replace if out of spec.
If the solenoid is good, inspect the valve body for wear or debris. Clear the code and road-test.

FAQ

Quick answers

Is it safe to drive with P0746?+

Short trips are usually fine, but low line pressure lets clutches slip, which overheats and wears the transmission — get it fixed before it worsens.

Can I just clear P0746?+

You can, but it returns once the solenoid or pressure fault reappears. Check the fluid and solenoid rather than only clearing it.

Read & clear P0746 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