P2738
Pressure Control Solenoid F Control Circuit Low
Transmission pressure control
Generic OBD-II
Medium
What it means
P2738 means low voltage in the control circuit for transmission pressure control solenoid 'F', usually a short-to-ground. Line pressure is affected, so shift quality suffers, but the engine still starts and runs.
Medium
Can I keep driving? Drivable short-term, but low line-pressure control can cause harsh shifts or slipping and possible limp mode — avoid hard driving.
Common symptoms
What you'll notice
- Check-engine light on
- Harsh or slipping shifts
- Possible limp mode
- Delayed or reduced gear engagement
Common causes
Most likely first
- Short-to-ground in the solenoid 'F' control circuitLikely
- Faulty pressure control solenoid 'F'Common
- Chafed or damaged internal transmission harnessCommon
- Corroded or loose connectorLess often
- Faulty TCM/PCM driverLess often
How to diagnose & fix
Work through it in order
- Check transmission fluid level and condition.
- Read codes and freeze-frame data.
- Inspect the circuit for shorts-to-ground or chafing.
- Measure the solenoid resistance; replace the solenoid or internal harness if faulty.
- If the circuit is clean, suspect the TCM/PCM. Clear and road-test.
FAQ
Quick answers
Is it safe to drive with P2738?+
Short, gentle trips are usually okay, but slipping or harsh shifts can damage the transmission. Get it checked soon.
Can I just clear P2738?+
It returns until the low-circuit (short) or solenoid fault is repaired.
Related codes
Often seen with P2738
Read & clear P2738 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX