The reductant level sensor communicates to the ECM the DEF fluid level present in it's storage tank. P203B is the trouble code defined as "Reductant Level Sensor Circuit Range/Performance" and indicates a detected unexpected electrical reading from the sensor circuit as identified by the ECM. A reductant DEF tank: How to reset the Adblue mileage countdown when it won't reset on its own. Usually you can add more adblue and reset the computer by tuning the key to the on Touareg Adblue refilling. After 15000kms it was time to check the adblue levels and refill, also to personally ascertain the consumption. Referring to a 2021 CR, 210 TDI here but it's more about refilling and measuring. Bought two X 10 litres and tipped in the first can carefully, the nozzle they provide is pretty handy. TDI. 2015 Golf Wagon. Jul 5, 2022. #1. I have a 2015 Golf TDI wagon with about 75K miles. Six weeks ago, the Ad Blue indicator came on. Soon after the engine light came on. I added the Ad Blue, but the engine light stayed on and the Ad Blue didn't reset. The dealer said it needs a tank; however, the part is on backorder with no information on a Just bought my 2015 Golf a month ago from a used car dealer. As soon as I started driving it, the dash read 950 kms til engine won’t start. I’m not worried right away because that’s a lot of kms. After a week I buy some DEF and top it up. Nothing changes. After a month of driving I made an appointment at Volkswagen and they diagnosed a The purpose of the Adblue system is to reduce emissions of nitrogen oxide from your car’s engine. When the system isn’t working correctly, it can cause damage to your car’s engine and catalytic converter. If you see the Adblue warning light, it’s important to take your car to a mechanic as soon as possible for diagnosis and repair. Most likely it's an annoying software bug on early T6 engines - fixed by a software update. For me (+quite a few others) the hiccup has cleared by itself after a few startups and just driving. Today the warning to refill the adblue tank popped up. I put 2.5 gal into the tank and tried to get the warning to go away. I tried turning on the car but not the engine and putting the gas pedal to the floor to have the glow plug light pop up but it never did show. I’ve tried several times with no luck. Any help would be appreciated. My guy DnaO.

how to check adblue level vw golf