69K miles and finally went in for the NOx recall. The P21DD for the DEF tank was putting it into derate count down so in it went. Radio blanked out recently and had a slow coolant leak for some time, figured water pump. Car received: -NOx recall and PCM reflash -new DEF reservoir kit -negative...

Got these two codes this week while on hiway. Check engine lite, def light, countdown came on Took to dealer today since it was on count down to slow limp mode. Right now dealer says it is glow plug module. Had to order part, so hope to get back tomorrow. Hope it is fix. Looking more at...

It's my turn... just came from work today and when I start it I've got this message for reduced speed going to limp mode "160km until 104km/hr". I've checked the code with my ScanGaugeII and it shows P20B9 which I believe is the DEF heater. I consider myself lucky that this situation happen now...

So, I have had zero issues with my 2014 Cruze Diesel for the first 50,000 miles. Yesterday, at ~50,950 the streak was broken. During the final hour of a 600 mile drive, while my wife was driving the car the CEL came on. Once home, I checked it with my hand scanner and got a P21DD (Reductant...

I have been reading around the forums about the p20b9 code. The dealership is telling me its the glow plug module and it needs to be replaced, and of course it's not covered under the warranty. From what I have seen here most people are having their reservoir or tank heater replaced with this...

P21DD & p20B9 The failed DEF tank heater has put the car in reduced power mode, dropping max speed at every 75 miles down to a max of 4mph. The dealer is working on it but these tanks are hard to locate. We'll see how this one goes. These over the top environmental BS controls are killing our...