Engine Light - Fault Code P005A

Typically a hall sensor measuring on the cam pulley.
With the warning still coming up but then going away. Likely the ecu clears the display after x starts or x minutes of running without picking up the sensor error again.
 
Paul Kemp said:
With the warning still coming up but then going away. Likely the ecu clears the display after x starts or x minutes of running without picking up the sensor error again.
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Yes, most likely.

Will keep an eye on things as all seems good right now. At least I can identify the fault code if it happens again, I have left my OBD-II dongle in the car just in case.
 
Having a quick look at the sensor itself

1709901530579.png

Turns out the engine has two sensor exactly like this, both have that odd plastic bit what you plug the wire in (as above). Maybe this is why the error relates to bank 1. That said, the top sensor indicated below was a little funky with how it was fitted, I gave it a wiggle and jiggle.


1709901484646.png
 
AdrianH said:
Having a quick look at the sensor itself

View attachment 1672979

Turns out the engine has two sensor exactly like this, both have that odd plastic bit what you plug the wire in (as above). Maybe this is why the error relates to bank 1. That said, the top sensor indicated below was a little funky with how it was fitted, I gave it a wiggle and jiggle.


View attachment 1672977
Click to expand...
Hopefully that sorts it out, was the car in for some service at some point?
 
AdrianH said:
Oh yeah, self service indeed.

Hell, when you go to the grocery store, you do self-checkout where you scan, pack and pay for your groceries yourself.
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what a country looks like when they NOT trying to create jobs for people that biggest skill is existing
but sure the UK has crime, and sure there are dodgy areas, and sure its not all sunshine and roses
 
TheChamp said:
Hopefully that sorts it out, was the car in for some service at some point?
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No, it hasn't had its first service yet, still a spring chicken car.

Even though I haven't received a warning or engine light on dashboard, I decided to run the OBD diagnostics again and I could see the error code has occurred again.

I have booked it in for next Wednesday, Vauxhall can figure it out.
 
AdrianH said:
No, it hasn't had its first service yet, still a spring chicken car.

Even though I haven't received a warning or engine light on dashboard, I decided to run the OBD diagnostics again and I could see the error code has occurred again.

I have booked it in for next Wednesday, Vauxhall can figure it out.
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Okay, it could indeed be a sensor that was not plugged properly, my brother had a similar in a brand new car, just lost power and engine light, turns out it was also a sensor that wasn't plugged properly, production quality issue.
 
TheChamp said:
Okay, it could indeed be a sensor that was not plugged properly, my brother had a similar in a brand new car, just lost power and engine light, turns out it was also a sensor that wasn't plugged properly, production quality issue.
Click to expand...
I did wiggle the two sensors, maybe one of them is dirty or faulty. I did also read that apart from the sensors, it may also be the "cambelt variable timing solenoid" so now I am inclined to let Vauxhall resolve it.
 
Have an update. Vauxhall have come back to say the "camshaft phasers" needed adjusting (or replacing, I need to ask).

This aligns with what I have managed to find out over the last few weeks as I found an Astra and Corsa owner experiencing the with same intermittent fault, and they both had timing issues that once resolved/adjusted, fixed their faults. Camshaft phasers can affect timing as below:

Today’s modern vehicles are equipped with variable valve timing systems. The cam phaser is an integral part of the VVT system, helping to improve efficiency, increase fuel economy and reduce emissions. These computer-controlled sprockets are mounted to the cam drive sprocket, thereby controlling the camshaft.

Cam phasers are needed to change the camshaft position. It must remain in the right position with the crankshaft to ensure proper valve timing within the engine.
Click to expand...

So hoping the "camshaft phasers" were indeed the cause, and the fault won't appear again.
 
Just an update...

The issue and why it took so long to finally resolve was that the error would randomly occur, sometimes weeks apart, and would disappear if the car was switched off, no fault logs were saved to car.

Vauxhall could also not lodge a warranty claim unless I could bring them the car with the fault showing. Then on each visit, they would do something, I would take the car and see if it shows up or not. This happend 3 times or so.

Ultimately, the dephaser hubs and sprockets were replaced. They actually replaced both banks, even though the fault was always on bank 1.

Hopefully this will help somebody if they ever get a P005A fault.
 
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