P0701
Transmission Control System Range/Performance
Transmission control
Generic OBD-II
Medium
What it means
P0701 means the transmission control system has failed a range or performance (rationality) check — the module's readings don't match what it expects. It usually points to a shift solenoid, sensor, wiring, or fluid problem, and often appears alongside a more specific transmission code that pinpoints the actual fault.
Medium
Can I keep driving? Often yes, but cautiously — the transmission may shift harshly, erratically, or drop into a fail-safe (limp) mode. Have it checked soon to avoid further wear.
Common symptoms
What you'll notice
- Harsh, delayed, or erratic shifting
- Transmission stuck in one gear (limp mode)
- Check-engine light on
- Reduced fuel economy
Common causes
Most likely first
- Faulty shift solenoid or transmission control componentLikely
- Wiring or connector fault in the transmission control circuitCommon
- Low or degraded transmission fluidCommon
- Faulty transmission range/position sensorLess often
- Faulty transmission control moduleLess often
How to diagnose & fix
Work through it in order
- Scan and read freeze-frame plus any companion transmission codes — P0701 often accompanies a more specific fault.
- Check the transmission fluid level and condition.
- Inspect the transmission harness connectors and wiring for damage or corrosion.
- Test the shift solenoids and range sensor per the service data.
- Repair the specific fault found; replace the TCM only after wiring and components are ruled out.
FAQ
Quick answers
Is it safe to drive with P0701?+
Short trips usually, but expect rough or limited shifting. Prolonged driving in limp mode adds wear, so get it diagnosed soon.
Can I just clear P0701?+
It returns once the control system sees the fault again, and clearing it erases the freeze-frame data that helps diagnosis.
Related codes
Often seen with P0701
Read & clear P0701 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