P207FReductant Quality Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P207F is the verdict that the tank holds something other than proper DEF, which CARB explicitly requires the OBD system to detect. Without a quality sensor the fluid is judged by its effect: GM's 2011 diesel table names the code Incorrect Reductant Composition and compares measured SCR NOx conversion with a limit that depends on temperature and flow, Type B; Volkswagen's 2014 Touareg TDI flags average efficiency below 0.50. GM PIP5007D adds that its Exhaust Fluid Quality Poor message on 6.6L LGH/LML trucks only reports lost conversion, not necessarily bad fluid. With a sensor the verdict is direct: Deutz files poor AdBlue as P207F-00 and a wrong fluid type as P207F-29. Ford SSM 46706, Nissan NTB17-060 (Titan XD 5.0L Cummins) and Hino SB-14-028 updated tests or software. Pure catalyst ageing belongs to P20EE.
- What you may notice
- Exhaust fluid quality warning in the cluster
- MIL and countdown to speed limit or no-restart
- Message persists until a quality test or relearn is passed
- Likely causes
- LikelyWater, coolant or other fluid in the DEF tank
- PossibleOld DEF degraded by heat or long storage
- PossibleNOx sensor reading wrong, faking poor conversion
- RarePartly blocked dosing valve delivering too little fluid
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.