I recently had a serious engine problem which caused the "check engine" light to go on and the engine can now not even be started.
I checked the ODB dtc / fault codes in 2 ways:
- An undocumented "test mode" in the dash display showed "dtcs none"
- I bought a bluetooth odb reader off Amazon and it also showed "no codes".
The reader I bought did display some data and it also reacted when cranking the car. So I assume that it was working properly.
My car is a 2010 Diesel Nissan Qashqai, so I assume, that the reader should be compatible.
Is it worth it trying to read the code with a better reader and if yes, what type of reader would be better? Or is it common, that seemingly major problems, which trigger the check engine light, don't actually record a code?