P0702 fault code: what it means

P0702: Gearbox computer reports an internal electrical fault. Expect limp mode (stuck in one gear).

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

gearbox control module fault

P0702 by make

Audi

Gearbox computer reports an internal electrical fault. Expect limp mode (stuck in one gear).

Usual causes: gearbox control module fault

Mercedes-Benz

Gearbox control module electrical fault. Limp mode (stuck in one gear).

Usual causes: gearbox control unit or conductor plate fault; oil in the 13-pin connector; low voltage

Skoda

Gearbox computer reports an internal electrical fault. Expect limp mode (stuck in one gear).

Usual causes: gearbox control module fault

Volkswagen

Gearbox computer reports an internal electrical fault. Expect limp mode (stuck in one gear).

Usual causes: gearbox control module fault

What the repair usually costs

Automatic transmission rebuild, 6-speed and up (sent to specialist)NZ$7,190–NZ$13,080 · A$6,190–A$11,830
DSG / dual-clutch mechatronic unit replacement (new or reman)NZ$4,300–NZ$7,160 · A$3,750–A$6,390
DSG mechatronic repair / rebuild (unit sent to specialist)NZ$2,070–NZ$4,800 · A$1,890–A$4,250
Alternator replace (small / medium car, petrol)NZ$510–NZ$1,020 · A$480–A$1,000

Not sure what P0702 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.