P207F: Reductant (AdBlue) quality performance
The ECU believes the AdBlue in the tank is not right: diluted, contaminated or at the wrong strength. Sometimes the quality sensor itself has failed.
| Code | P207F |
|---|---|
| System | Engine and transmission |
| Group | P20xx, Emissions: catalysts and AdBlue |
| Type | Generic: it means the same on every make |
| Can you keep driving? | With care |
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- AdBlue out of date or degraded by heat or long storage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.
Open the bonnetthe in-depth explanation
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 its description and whether it’s confirmed, pending or permanent.
If the engine stores it over standard OBD, with FREE you read this code with its explanation for nothing and clear it. With PRO you also read the faults of every control unit and clear them in all of them.
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 an inspection. It’s all in how to read and clear fault codes and in inspections and OBD.
Similar codes
- P207B The position sensor or switch circuit signal for the intake air actuator on
- P207C The position sensor or switch circuit for the intake manifold air actuator on
- P207D The position sensor or switch circuit for the intake manifold air actuator on
- P207E The position sensor or switch circuit for the intake manifold air actuator on
- P2080 Exhaust gas temperature sensor reading out of range (bank 1, sensor 1)
- P2081 Exhaust gas temperature sensor circuit intermittent (bank 1, sensor 1)
- P2082 The exhaust gas temperature sensor (bank 2
- P2083 The exhaust gas temperature sensor (bank 2, sensor 1) fails now and then
- 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)
What does code P207F mean?
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.
Can you drive with P207F?
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 do you clear P207F?
With an OBD2 scanner and an app like Final OBD, which clears it for free if it’s stored by the engine control unit. But clearing it only turns the light off: if the cause isn’t fixed, P207F comes back.
Read it on your car
Final OBD reads and clears engine faults through standard OBD for free, each one explained in plain English. With PRO it also reads the faults of every control unit, each make’s own codes included, and clears them in all of them.
