Audi
Engine speed (crank) sensor signal is erratic. The engine can cut out or refuse to start, and the rev counter may drop to zero.
P0321 fault code: what it means
P0321: Engine speed (crank) sensor signal is erratic. The engine can cut out or refuse to start, and the rev counter may drop to zero.
Usual causes, most likely first
- loose or faulty engine speed sensor (G28)
- damaged sensor wiring (oil or coolant soaked)
- damaged reluctor ring
P0321 by make
Skoda
Engine speed (crank) sensor signal is erratic. The engine can cut out or refuse to start, and the rev counter may drop to zero.
Volkswagen
Engine speed (crank) sensor signal is erratic. The engine can cut out or refuse to start, and the rev counter may drop to zero.
What the repair usually costs
- Crankshaft or camshaft position sensor replaceNZ$100–NZ$590 · A$100–A$580
Not sure what P0321 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.