Audi Q7 3.0TDI Fails to Start After Battery Replacement: Steering Angle Sensor Error

Hello, help please, I have a problem with the audi q7 3.0TDI after replacing the battery (the old one has discharged a maximum), the car does not start even with cables from the second car. After diagnostics, there are no errors in the engine controller, only what came out is the steering angle sensor sensor error - terminal voltage + 30, oil pressure sensor damage - short circuit to plus, I ask for help although I read on the forum that someone had the same problem and solved it but the topic was closed without an answer. I will add that after charging the battery and installing it in the car it shows a 10% charge, please suggestions where to look for the problem. Regards and hints for some hints

Replacement of the battery must be encoded in this car, if it still does not want to start it would suit to check whether there is permission to start the engine ...

sk700 thanks for the hint buy a new battery for sure and I will try to code

Added after 1 [minutes]:

sk 700 and it is normal that it shows a 10% charge

Added after 3 [minutes]:

how how to check if there is permission to start the engine

In measuring blocks, but code a new battery first.

sk 700 thanks for the info tomorrow I will collect the battery and I will code and then we will see what will happen despite everything thanks to you ladies for hints I will answer and let you know

Without coding, it should light up, if you did not mistake the clamp ... Or just the battery sucks, or maybe the weight on the right side member .

jkm73 thanks for the hints but the mass on the side member of the engine I checked for contact and corrosion everything is ok

Added after 14 [minutes]:

, the old battery I checked and came out that it has 65% efficiency, juro, I will insert a new one and encode and see, but if you have any ideas on what to pay attention to, please give hints and thank you very much

I bought a new battery and turns without clutching, but the car still doesn't smoke, so I checked the engine speed during the turn and came out in the range of 126 to 140 rpm (invisible or sometimes it should not be 250), I also checked the pressure in the ramp and it is 00 bar. does anyone know what's going on because there are no mistakes

Disconnect the flow and see if it throws an error.
Give autoscana so we know what we're talking about.
Is the cake good?

Engine speed too low.

Added after 1 [minutes]:

There will be over 200 that will light up.

Without pressure on the strip it won't get far, even if now somehow there is no pressure error, after farting on the cake must catch it. Unless the controller has garage engine bloom.
Rotation sensors might be freaking out but then there should be a synchronization error.
Someone more experienced must confirm this but these engines had about 140 revolutions on the starter.
Give autoscana because we don't even know what engine code we're talking about.

SK 700 also doesn't smoke, I don't want to catch it, but unfortunately it doesn't start

Added after 4 [minutes]:

gentlemen, just a moment ago I connected a computer under the same engine and Ania while turning it was 196 revolutions and 320 bar pressure, if the pressure sensor on the rail flew at me and he does not give the command to open the injectors or it is open and turning the starter I can not put pressure on it you think

Added after 2 [minutes]:

sk 700 engine code BUG 171 KW 3.0 TDI

There may be a pressure problem, but why not catch a low pressure error? Unplug this sensor and check if it fires and if it catches its error because you may have been ecused. I wonder that he doesn't even get it. Maybe it's worth taking a look what's happening in the inlet?

hello I was just embracing the car and it turns out that there is a problem with the fuel on the high pressure ramp after unscrewing one of the fuel feed lines to the injection it turns out that no fuel leaks during start-up (there is no pressure even the fuel does not leak). the first suspicion fell on the fuel pump in tank, however, the pump feeds the filter fuel from the filter chasing through the fuel temperature sensor to the CR pump and here I think there is a problem because there is a fuel dispensing valve on the side of the pump (I don't know how to check it works, I can connect the meter and check if it comes to voltage) the problem is that there are three wires in it and I do not know where to connect so that something does not screw up. All those who know the topic of cr pump please help, maybe someone will give an idea how to go about it, greetings and please help

Start by measuring the pressure of the pump in the tank, they fell so that they pumped but under too low pressure and were unable to power the CR pump. Ew, hook up another one for a trial.

from what orjeje, there are two pumps in the tank tomorrow I will be tearing, so let me know

hello it turned out that there are two pumps in the tank today I checked them everything with them ok they give the right amount of fuel according to the service, my suspicion fell on the fuel dispensing valve at the CR pump and someone knows how to check it

I have the same problem. Can you write how you solved the problem and what happened?

Clear the errors - especially in the take-off permission and it should start. Are your lights on? Is the steering wheel unlocked????

I am writing with the same problem car does not start no pressure on the rail 0 bar when spinning. Replaced CR pump and all sensors on the strip. Does anyone know the solution?