Camshaft Position Sensor error code

[Chard]

I'm getting a P0023 Bank 2 (exhaust) camshaft position actuator malfunction.
Can someone point me to the location of this in the engine bay? And better yet, does anyone have instructions on how to replace it?



I'd love to get the car running again. Just had a dead water pump fixed and a split vacuum hose detected...car hasn't been running correctly since August.

Much thanks in advance!

[a4audi4fun]

Haven't been able to find a top end engine schematic - look at the ends of the camshafts for the sensor you've pictured. It's just one screw to remove and replace. The non-wire connector end is likely perpendicular to the length of the camshaft. On my old 3.0 V6 it was on the front outside of the V but don't know if it would be the same for the newer S4 engine.

Edit: - Found this picture, sensor looks like part #4

[freshjive]

If you're getting a camshaft position actuator fault i don't think the part you posted will fix it. That is a camshaft position sensor. The part you're looking for would be similar to a VVT solenoid/actuator.

If possible get a code readout with Vagcom or ODIS, it may give a better description of which actuator you need to replace.

[A4 Centaur]

Jump to 19:45

https://www.youtube.com/watch?v=aIHATDhwwUs&t=1090s

https://www.genuineaudiparts.com/oem...bC12Ni1nYXM%3D

[Chard]

If you're getting a camshaft position actuator fault i don't think the part you posted will fix it. That is a camshaft position sensor. The part you're looking for would be similar to a VVT solenoid/actuator.

If possible get a code readout with Vagcom or ODIS, it may give a better description of which actuator you need to replace.

This is the code readout and the suggested fix:

[Chard]

Jump to 19:45

https://www.youtube.com/watch?v=aIHATDhwwUs&t=1090s

https://www.genuineaudiparts.com/oem...bC12Ni1nYXM%3D

Am I missing something? I'm not seeing the location at 19:45...
Maybe it's in another section of the video? I saw him pick up one of the sensors in the very beginning.

[A4 Centaur]

^ Yea, the two things sitting on the engine cover are the Camshaft Adjusters, just like what is in the schematic at Genuine Audi Parts.com

06M-109-088-K Other Names: Actuator, Adjuster Description:

A7 Quattro. Exhaust. To 02/04/19. Used with 06m109087f.
Applications: 3.0L. 2.9L. 4.0L.

[TheContrarian]

Am I missing something? I'm not seeing the location at 19:45...
Maybe it's in another section of the video? I saw him pick up one of the sensors in the very beginning.

I think he is saying that you probably have a rocker arm issue and the cam position fault is a symptom.

Do you have a loud clacking from the engine? Any metal present on the oil filter?

[Chard]

I recently did an oil change and didn't see any metal in the filter or the oil.
No loud clacking but while this code is on, I notice the car's exhaust note sounds a bit different.

[A4 Centaur]

https://www.carparts.com/blog/p0023-...ircuit-bank-2/

https://www.audizine.com/forum/showt...377-P0023-code

https://forums.audirevolution.net/t/...n-bank-2/10592

[Chard]

I've located the sensor in the engine bay, behind the throttle body. But it seems to be under a bunch of hoses that aren't easily moved. Does anyone know how to access it?

Also, upon inspection, it seems the wires leading to the part were damaged/repaired at some point. Perhaps there's a loose connection in the repair? Is there an easy way to test for this?

[Smac770]

The VVT solenoids ("magnets") are 2-wire connections, with a common yellow/red for 12v on pin 2 and then a separate ECM managed ground line on pin 1.
The cam position sensors are 3-wire connections, each of the four with three separate wires from sensor to ECM.

The wires for the G301 (bank 2 exhaust cam position sensor) is blue on 1, gray/red on 2, gray/white on 3. If it's the typical cam position sensor, you need to confirm 5V from pin 1 to pin 3; this is the power/ground from the ECM to the sensor. The output signal from the sensor to the ECM is on pin 2.

But P0023 is not talking about the G301, the way I read it. It's talking about the N319 solenoid (magnet) that the ECM actuates with a PWM signal to toggle the control valve to manage the oil flow into the vane adjuster.

[Chard]

The VVT solenoids ("magnets") are 2-wire connections, with a common yellow/red for 12v on pin 2 and then a separate ECM managed ground line on pin 1.
The cam position sensors are 3-wire connections, each of the four with three separate wires from sensor to ECM.

The wires for the G301 (bank 2 exhaust cam position sensor) is blue on 1, gray/red on 2, gray/white on 3. If it's the typical cam position sensor, you need to confirm 5V from pin 1 to pin 3; this is the power/ground from the ECM to the sensor. The output signal from the sensor to the ECM is on pin 2.

But P0023 is not talking about the G301, the way I read it. It's talking about the N319 solenoid (magnet) that the ECM actuates with a PWM signal to toggle the control valve to manage the oil flow into the vane adjuster.

Thank you for the position sensor voltage tip. I tested my harness and I'm seeing 5v between pins 1 and 3. What should the output read? My pin 2 (red/black) wire sheathing has broken, but it looks like the wiring is still connected, so I want to make sure it's receiving.

I've also pulled the Bank 2 exhaust and intake cam angle sensors and measured the resistance across them. Even though I'm getting P0023, I'm still seeing about 7.8 ohms across the sensor's 2 pins. I'm not sure if that's right, but they both read the same even though I'm only getting a fault on the exhaust sensor.

When installing a new one, I want to verify you push it in, then rotate until the peg finds the notch in the cam, seat it, then rotate around so the screw holes line up, correct? The cam will rotate the sensor?
Also, how terrible is it to drive the car with this malfunction? I'm waiting on the new part to be shipped.

[Chard]

The VVT solenoids ("magnets") are 2-wire connections, with a common yellow/red for 12v on pin 2 and then a separate ECM managed ground line on pin 1.
The cam position sensors are 3-wire connections, each of the four with three separate wires from sensor to ECM.

The wires for the G301 (bank 2 exhaust cam position sensor) is blue on 1, gray/red on 2, gray/white on 3. If it's the typical cam position sensor, you need to confirm 5V from pin 1 to pin 3; this is the power/ground from the ECM to the sensor. The output signal from the sensor to the ECM is on pin 2.

But P0023 is not talking about the G301, the way I read it. It's talking about the N319 solenoid (magnet) that the ECM actuates with a PWM signal to toggle the control valve to manage the oil flow into the vane adjuster.

How much power should I be seeing from the pin 2 wire? Since this is the one with the wire sheathing sheared, I’m wondering if the signal is getting through to the ECU.

FYI, I’ve swapped the intake and exhaust vvt solenoids and the code remained the same.

[Smac770]

It's a cam position sensor, you're not likely to make much of the output signal without a scope. I'm sure there's a set voltage average a meter will show, but the signal is one that bounces between 0v and 5v.

No idea the validity of the information the guy is saying in the video, it simply has the picture I want convey as the first hit in a google search. youtu.be/2D9VZ06B8Jg?t=305

The cam position sensors are 3-wire Hall sensors. No idea if pull up or pull down, but how to test is likely a commonly documented thing out there. Do know the supply voltage is 5V.

[AldermanToffee]

It's a cam position sensor, you're not likely to make much of the output signal without a scope. I'm sure there's a set voltage average a meter will show, but the signal is one that bounces between 0v and 5v.

No idea the validity of the information the guy is saying in the video, it simply has the picture I want convey as the first hit in a google search. youtu.be/2D9VZ06B8Jg?t=305

The cam position sensors are 3-wire Hall sensors. No idea if pull up or pull down, but how to test is likely a commonly documented thing out there. Do know the supply voltage is 5V.

Crank is pull down so going to assume similar for cam position.