P1020 fault code: what it means

P1020: Valvetronic eccentric shaft sensor power supply low.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

1. wiring fault
2. faulty eccentric shaft sensor
3. DME fault

P1020 by make

Not sure what P1020 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.