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P0700 fault code: what it means

P0700: Transmission control system fault. This only says the gearbox computer has stored its own code; read the TCM for the real fault.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

  1. low or old transmission fluid
  2. faulty shift solenoid pack
  3. valve body wear
  4. TCM fault

P0700 by make

Ford

Transmission control fault: a general flag that the gearbox computer has stored its own code. Read the transmission codes to see the real fault.

Usual causes: stored transmission fault (solenoid, sensor or pressure); TCM fault

GWM

Transmission control system fault stored (ZF 8-speed auto on Cannon). Read the TCM for the actual code.

Usual causes: fault stored in TCM; gearbox wiring; low fluid

Haval

Transmission (DCT) control system fault stored. Read the TCU for the actual code.

Usual causes: fault stored in the DCT control unit; gearbox wiring; needs TCU software or clutch relearn

Hyundai

Transmission control module has stored its own fault and turned on the check engine light. Read the TCM codes.

Usual causes: 7-speed DCT clutch wear or actuator fault (1.6 T-GDI); IVT/CVT fault (Smartstream); 6-speed auto valve body or solenoid fault; TCM wiring or software

Isuzu

Transmission control system fault stored. Read the TCM for the actual code.

Usual causes: fault stored in TCM; gearbox wiring; low fluid

Jeep

Transmission control system fault stored. Read the gearbox module for the actual code.

Usual causes: fault stored in TCM (read separately); gearbox wiring; low fluid

Kia

Transmission control module has stored a fault and turned on the check engine light. Read the TCM codes.

Usual causes: DCT clutch judder/wear (Niro hybrid 6-speed DCT, 7-speed DCT); IVT/CVT fault (Seltos 2.0); 6-speed auto valve body or solenoid fault; TCM wiring or software

LDV

Transmission control system fault stored. Read the TCM for the actual code.

Usual causes: fault stored in TCM; gearbox wiring; low fluid

Mercedes-Benz

Transmission control fault stored (general). On Mercedes read the gearbox module for the detail code.

Usual causes: leaking 13-pin gearbox connector; faulty conductor plate (speed sensors); low transmission fluid

MG

Transmission control system fault stored (CVT/DCT/auto). Read the TCU for the actual code.

Usual causes: fault stored in TCU; gearbox wiring; low fluid or needs relearn

Mitsubishi

Transmission computer has stored a fault. Read the CVT/TCM codes to find the real problem.

Usual causes: CVT valve body or solenoid fault; low or degraded CVT fluid; wiring or TCM fault

Subaru

Transmission computer (TCM) has stored a fault. Read the TCM codes (e.g. P2764) to find the real problem. Check for the extended Subaru CVT warranty.

Usual causes: CVT lock-up (torque converter) solenoid fault; CVT valve body fault; low or degraded CVT fluid; wiring or TCM fault

Suzuki

Transmission control system fault stored. Read the TCM for the actual code.

Usual causes: fault stored in TCM; gearbox wiring; low fluid

Volvo

Transmission control system fault stored. Read the gearbox module (TCM) for the actual code.

Usual causes: fault stored in TCM; gearbox wiring; low or old fluid

What the repair usually costs

Not sure what P0700 means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.