P0471 fault code: what it means

P0471: Exhaust back-pressure sensor reading is out of range (diesel DPF / EGR systems).

Engine and gearbox (powertrain) · Minor

Usual causes, most likely first

1. blocked, split or disconnected sensor pipe
2. failed exhaust pressure sensor
3. wrong replacement sensor fitted

What the repair usually costs

• CVT valve body replacement (remanufactured, in car)NZ$1,280–NZ$2,420 · A$1,200–A$2,400

Not sure what P0471 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.