VW Passat 2009 2.0 TDI - Error P0651 - the engine does not start

Question

Good evening, I hope he writes in the right section. Yesterday my Passat stopped starting, I got the message Engine Fault Workshop! and the indicator of the candles zarowe (such a yellow spring) began to blink. The car turned but did not start. Today a friend plugged the car under the computer...

grala1 · Accepted Answer

What parameters does the G31 boost pressure sensor show? What is the error after disconnecting it and what can you see then in the measuring blocks?

trumnica · Accepted Answer

3 ... 9292.9292.0.9557.1.1.0.0.0.0.65.65.1.1.0 .... 0 ... 1c.1.64.img..1.0.0.uvfa_s0tljQ Check the harness before replacing the sensor.

grala1 · Accepted Answer

Look on the hose going to the intake manifold from the intercooler on the radiator side.

grala1 · Accepted Answer

Not a differential pressure sensor from the particle filter. Look for a sensor on the pipe that feeds air to the intake manifold - a pipe with a diameter of about 60mm. Show photos under the hood.

domex32 · Accepted Answer

This is the fluid pump for the exhaust gas cooler.

You have the sensor a bit above this pump, on the plastic hose that brings air to the aluminum throttle which you can see in the photo in the middle of the front of the engine.

Alternatively, look under the air-conditioning compressor, on the plastic pipe.

@ grala1 sent a picture of 2 liters but 8 valves on unit injectors, your piping system is different.

Where did the suggestion about a damaged boost sensor come from?

Anonymous · Accepted Answer

Assignment of sensors to data A / B / C sensor reference voltages Connected sensors A reference voltage: I Air mass meter -G70- I Exhaust gas recirculation potentiometer -G212- I Accelerator pedal position sensor -G79- I Exhaust gas pressure sensor 1 -G450- I Intake manifold flap potentiometer -G336- I Position sensor of the boost pressure regulator -G581- Connected sensors B reference voltage: I Accelerator pedal position sensor 2 -G185- I Hall sensor -G40- I Boost pressure sensor -G31- / intake air temperature sensor -G42- (they constitute one subassembly) I Engine speed sensor -G28- Sensors connected to the reference voltage C: unused After your mistake you must look for - Sensors connected to reference voltage B: - any damaged / short circuit in the installation. Disconnect the cubes one by one and check if it fires. If not - take the car to a specialist. Added after 4 [minutes]: And so, after the photo itself, remove the ankle from the engine controller, it is possible that the oil has wandered over the cables from the zarzyganej throttle / EGR and made a crap. I have had a few such cases recently in commonach. No, but you're close now

fuelinyourblood · Accepted Answer

Unscrew the top from the fuse box under the hood and then see if you turn it or it fires. In addition, in these models there was a service note regarding the steering column. Bad contacts may cause it to smoke.

fuelinyourblood · Accepted Answer

There were recall of the column because it is combined with the steering lock and the ignition. I understand that you have no ignition?

Have you checked the injectors? Compact injection to the mass and you will not ignite it, and you will not have the error in your memory.

fuelinyourblood · Accepted Answer

Is there a power supply, for example, on the ecu. flow, or egr? If you give the voltage on the fuel pump, will it ignite?

michalB6 · Answer

Thanks for the answer. Unfortunately, I am a complete layman .. could you advise where this sensor is located? Thanks again

michalB6 · Answer

Thanks for the answers. Is this the sensor it is about? ?

michalB6 · Answer

Thank you very much. greetings

grala1 · Answer

Not seen in this photo.
See the picture.
Element number 18.

He is screwed to a plastic pipe.
The sensor has a plug with 4 wires.

The sensor measures the pressure between the intercooler and the intake manifold, which is supplied with air by a rubber hose (marked in the photo) from the intercooler.

michalB6 · Answer

grela1 got under the car, unscrewed the plastics and found something like this: is that it? Thanks and regards

michalB6 · Answer

Hey, thanks for the answer. Unfortunately, however, I gave up and took the car to the mechanics, because I need it for the next week. Upon receipt, I will describe what was broken and how it was repaired. Many thanks for the answers and best regards!

michalB6 · Answer

Good morning,

I have news from the mechanic: they mentioned "boost pressure sensor" and the problem still exists. The mechanics checked the pump that pumps the fuel from the tank and the pump does not get electricity, the injectors are dry, the car fires on the easy start spray. If someone from you has encountered a similar problem, please advise me.

Thanks for the answers,

greetings
Michael

michalB6 · Answer

Hey, thanks for the answer. The fuse box is open and the problem persists. The mechanic asked to ask which contacts under this steering column to check? Thanks a lot for the answer, Greetings!

michalB6 · Answer

I checked with a vin dealer and my car doesn't qualify. Yes, the car does not start, but it does spin the starter. The injectors (if they are the same as the injectors) are dry - they do not get fuel. My mechanic puts on a pump from the tank because there is no electricity for some reason - is it possible that this is a compact injection? Many thanks for the valuable hint - I'm already calling the mechanic with this news! Best wishes!

michalB6 · Answer

Hey the power is on ecu, flow, egr. The pump in the tank does not get tension, but when we stated the voltage, it worked, but the engine still did not start .. They also checked this mass at injection and everything seems to be OK. Many thanks for the answer. greetings

grala1 · Answer

I propose to change the mechanic to electronics.
Who came up with the idea of replacing the boost pressure sensor?
You didn't answer the questions I asked in post 2.
What is the supply voltage of the boost pressure sensor.
You suggest something to the mechanic and he mentions it.
He will be replacing your steering lock in a moment.
Anyone at all checked whether the engine controller can see the speed of the engine (shaft)?

michalB6 · Answer

Hey grala1, The voltage is 4.5v. When we turn the starter, the computer shows the correct engine speed. Thanks for the answer greetings

grala1 · Answer

What pressure does the EDC see? Will there be an error if you unplug the pressure sensor?

michalB6 · Answer

Yes, an error pops up like a sensor unfastened. I will ask about the pressure. Thanks!

michalB6 · Answer

Hello everyone on this topic. The car was repaired - the oil cooler melted the cables running next to it and hence the action. Cables repaired - the car starts and drives. Many thanks for all the advice in this thread.
Greetings!

VW Passat 2009 2.0 TDI - Error P0651 - the engine does not start

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