P207F: Reductant (AdBlue) quality performance

What P207F means

AdBlue is a very pure mix of urea and water that a diesel’s SCR system injects into the exhaust to reduce nitrogen oxides. If its strength is wrong, the system cannot clean the exhaust properly. The ECU spots this with a quality sensor in the tank, or by seeing that the NOx sensors do not improve when it injects.

Most common causes

• AdBlue tank topped up with water or another fluid by mistake
• AdBlue out of date or degraded by heat or long storage
• Tank contaminated with dirt or diesel
• Faulty AdBlue quality sensor (often part of the pump module)
• Drifting NOx sensor making the quality look poor

Symptoms

• Engine warning light on
• AdBlue warning on the dashboard
• Possible countdown before the engine is prevented from starting
• Usually nothing noticeable when driving

Can you drive with P207F?

With care You can drive, but sort it out soon. On many cars, if the fault persists, a dashboard message counts down the distance left before the engine will not restart.

How to check it

Think about whether the last top-up came from a sealed, reliable container and whether anyone could have used the wrong filler. A garage can check the concentration with a refractometer in a minute; correct AdBlue is about 32.5 % urea.

How to read and clear P207F with Final OBD

Plug an OBD2 scanner in under the steering wheel, switch the ignition on and open Final OBD. Under Faults you’ll see P207F with this same explanation and whether it’s confirmed, pending or permanent.

With Free you read this code with its short description for nothing, and clear it if the engine stores it over standard OBD. With Pro you get the full explanation, how the car was running when it was logged (revs, temperature, load) and clearing in every control unit.

Clearing the code only turns the light off: if the cause is still there, it comes back. Clear it once it’s fixed, and not right before the ITV. It’s all in how to read and clear fault codes and in the ITV and OBD.

Similar codes

• P2032 Exhaust gas temperature sensor circuit low (bank 1, sensor 2)
• P2033 Exhaust gas temperature sensor circuit high (bank 1, sensor 2)
• P2047 AdBlue injector circuit open or faulty (bank 1, unit 1)
• P204F Reductant (AdBlue) system performance (bank 1)
• P2080 Exhaust gas temperature sensor reading out of range (bank 1, sensor 1)
• P2081 Exhaust gas temperature sensor circuit intermittent (bank 1, sensor 1)
• P2084 Exhaust gas temperature sensor reading out of range (bank 1, sensor 2)
• P2088 Camshaft position actuator A control circuit low (bank 1)
• P2002 Diesel particulate filter efficiency below threshold (bank 1)
• P2003 Diesel particulate filter efficiency below threshold (bank 2)
• P2004 Intake manifold runner control stuck open (bank 1)
• P2005 Intake manifold runner control stuck open (bank 2)

P207F is a generic code, so it means the same on any make, for example on Citroën, Hyundai, Mercedes-Benz, Mini, Renault, Volvo. See what Final OBD does on your car in makes and models.