Audimon21

Hello everyone, Thank you in advance for your help.

I 2010 Q7 tdi that shut off while driving on the thruway on my way home from work. All the sudden it shut off while I was driving about 60 mph. I coasted off an exit ramp and tried to restart the truck. It cranked very slow until the battery died. I had it towed to a shop that doesn't know much about diesels. They told me it did need a battery but still wouldn't start when they had power to it so he said my problem was something else.
I got it towed home and tryed to start it with jumper cables but cranks very slow. It has the following codes:
-p2201nox sensor
-p0266 Cylinder 2,3, and 6 Contribution/Balance.
​​​​​​-p0087 Fuel Rail system pressure too low.
If anyone has any suggestions or any idea what could have happened to it, I would greatly appreciate it.

Edzzed

I have no solution for you, I am not a mechanic. What happened to me is I took my car in for an EGR cooler. A few days later I ask if the car is ready. He tells me they got a code for low fuel rail pressure. Short story is they replaced the fuel rail and still got the code. They ended up giving me a whole new fuel system. Do you have any remaining warranty. Note the address in Surrey. We were just about a mile away from Malone's tuning. We moved 400 KM's away.

'10Q7TDI_Prestige'

We need to know your mileage, the extended warranty status on your TDI, (have you looked it up by the VIN# to see?), and any relevant service history regards to parts prior replaced on it or work done, such as the HPFP, alternator, crankshaft pulley, battery, etc.; otherwise, it's all just conjecture and guessing at this point. Definitely go check Audi's TDI settlement site with your VIN# and pay attention to both sets of dates it provides you on the warranty extension.

The codes you or the 'non-diesel shop' pulled off it would seem to indicate fuel injector blockage problems, and the low fuel pressure may relate to a fragged HPFP, which could tie into the fuel injectors and certainly explain some bad things happening, as well as a car that won't run. Unless you scanned the car with VAG-compatible scantool, there's likely a bunch more trouble codes stored by the car you haven't seen yet. VAG=Volkswagen Auto Group. The slow cranking seems indicative of a weak, older battery, but that can easily be the result of constant parasitic drains from door handle sensors.

A weak battery alone will bring the car to its' knees and create havoc internally. Post up some further details regards to your car.

Audimon21

Thank you!
I Installed a new battery, now it's coming up
P242F Diesel Particulate Filter restriction.
I'm hoping this is the final problem!