P0701: OBD-II code P0701 flags a general performance fault in the transmission control system — the TCM detects data that doesn't correlate with expected shift behaviour.

Symptoms

• Check engine light is on; transmission may shift harshly, slip, or enter limp mode (stuck in one gear).
• Delayed engagement into drive or reverse, and unpredictable shifts.
• Companion TCM codes usually identify the specific underlying fault — P0701 alone is a wrapper.

Common causes

• Any active TCM code in the P07xx range affecting solenoids, speed sensors, or gear ratios.
• Low or contaminated transmission fluid affecting shift performance and solenoid response.
• A CAN bus fault between the TCM and the PCM disrupting shift coordination.

What to do?

Scan the TCM for its specific codes and address those first — P0701 is a downstream indicator. Check transmission fluid level and condition. P0701 clears automatically when the underlying fault is repaired.