P1028 fault code: what it means

P1028: Volvo code: throttle body internal fault (electronic throttle module).

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

worn electronic throttle module
throttle wiring or connector

P1028 by make

Volvo

Volvo code: throttle body internal fault (electronic throttle module).

Usual causes: worn electronic throttle module; throttle wiring or connector

What the repair usually costs

Throttle body clean and idle relearnNZ$90–NZ$190 · A$100–A$200
Electronic throttle body replaceNZ$470–NZ$1,290 · A$440–A$1,190

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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.