P207F fault code: what it means

P207F: AdBlue (reductant) quality performance: the NOx reduction is not working as expected, often poor or diluted AdBlue.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

1. diluted or contaminated AdBlue
2. failed AdBlue quality sensor
3. faulty NOx sensor
4. AdBlue injector fault

What the repair usually costs

• AdBlue / SCR fault diagnosis (scan, NOx and doser tests)NZ$70–NZ$280 · A$80–A$300
• AdBlue tank assembly or SCR catalyst replacement (dealer part)NZ$3,150–NZ$8,600 · A$2,780–A$7,650

Not sure what P207F 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.