pizipe

So I had pulled a p1296 a couple of days ago. I went and replaced the coolant temp sensor (the green updated one) and reset the codes. Car has been running fine until yesterday. I pulled into my driveway and shut it off for 10 mins. I went back to start it and it would crank but not turn over. I let it sit overnight and it started right up this morning. I now have a p1296 code again on a coolant temp sensor that has about 50 miles on it. Here are my questions:

1. Since I'm pulling a p1296 again and coolant temp sensor is brand new, bad thermostat? Or should I be looking elswehere?

2. Does the car not starting have anything to do with my "error in mapped cooling system" code, or should I just go ahead and change the Crank sensor and call it a coincidence?

Wrinkledpants

You would notice a bad thermostat by seeing coolent temperature deviations.

S4Ca$hwhore

Check connection first, but a bad thermostat could be a possibility...mine failed within 2 months

pizipe

My mechanic says it takes much longer to get up to temp than other S4's he's worked on

pizipe

I doubled checked the coolant temp sensor connection and it was good

Rory

Did you try measuring this with a VAG?

Rory

pizipe

I'm not "sure", but I'm assuming so since it's brand new. Which block do I log with VAG to check?

Rory

<a href="https://forums.audiworld.com/s4/msgs/2755459.phtml">Reading coolant temperature with VAG</a>

boardliving

Im currently having the same problem with my 02 a4. I replaced the cts and my light is still on and im getting a p1296 code. Nothing seems wrong with the car other than the fan running too much... has anyone had similiar trouble?