Ok guys without any reason out of the blue car sudden and randomly will issue 4 codes P0172, P0175, P0132, and P0152 I know what the codes mean I have cleaned the MAF, checked for any vaccum leaks, checked an cleaned all TB connections, and the car runs amazing. I get the failsafe mode of course. But I go in clear codes and its gone for a few days and then it will just appear again and I have no clue as to why any ideas

 

Im sure some of you techs out there have an idea or someone has had this same problem. I know the p0132 and p0152 are O2 sensor codes and the chances of them going out at the same time are slim to none. I am thinking either TB or MAF but dont want to buy both to not have them work any help is very much appreciated

 

guidelines suggest blocked air filter, fuel system return blockage, leaking fuel injectors, fuel pressure regulator failure (high fuel pressure) ecm receiving wrong data from ects,maf,iats or tps.

My gut feeling is tps.

It would help to know if you can pull fuel trims, and give model, year and mileage.

 

car is a 99 xjr with 66k on it i have checked air filter, and i was out looking at some thing and got some contact cleaner and took all the tb connections off and cleaned and noticed tht i really had to press the tps sensor on hard to make it snap I dont recall hving pressed hard before maybe it had a bad connection. I started the car and no failsafe mode was on and it was on earlier when I had shut the car off. I didnt clear codes at all, i may go drive around to see what happens. I dont have anyway to monitor fuel trims wish I did dont know what I could buy tht would allow me to do so.

 

You must have a limited OBDII code reader. There are a bunch of them out there that will show fuel trim data, short-term and long-term. I have a relatively cheap interface that connects your laptop to the OBDII port and it shows fuel trims in real time. You can also log data so that you can review it at your leisure. You might want to look into it, just FYI.

 

I will look into that for sure mine is just a small handheld. I am a very good tuner I have used HPtuners, efi live, and a few others with great success but jag doesnt have a fun interface like some others but ill go get a better obd2 reader

 

Ok new development I started the car ran great took it on the freeway perfect ran around for a couple hours nada no code no nothing. I went to the gym did my workout and started home and still running great no failsafe figured Id try my cruise again and few secs after i set the cruise the failsafe came on now Im leaning more towards tb what all you think??

 

brake/cruise switch, try a new one, it's located up in the foot well attached to the brake pedal.

 

ok will do thanks sean you the man will try it out today