[Leejohn01]

Hi there. Thank you so much for replying! The fuse 26 10A is not blown. Still intact. And the relay… would that be R12 - Engine control unit (ECU)? Thank you!

 

[Leejohn01]

I wouldn't have a clue, also check fuse #21 (20A), #22 (7.5A), #30 (10A) as they are on the same rail.

Thank you. They’re all intact. I’ll try to take out the relay and see what happens

 

[Leejohn01]

We've seen a lot of sensors coming incorrectly wired from new (Delphi in particular)

Haha it’s very annoying

 

[Leejohn01]

Have a read of this,it's the sort of thing that's happening

[Astra Mk5/H] [04-09] - Help please

Hi, I have an astra estate, 1.6 petrol. I had loss of power, delayed and intermittent throttle response, and then hunting revs at idle.codes P0130, P0135, P0100. Changed so far: O2 lambda sensor, MAF sensor, cat converter. Being directed towards throttle body now. Any advice welcome. Limited...

www.vauxhallownersnetwork.co.uk

thank you. I have used MyCarly and the MAF flow rate gives 0. Even at 5000rpm shown in the image. So is it safe to say the sensor has gone?

 

[Leejohn01]

Before you jump to any conclusions i need to know exactly which 1.6 engine this is,XEP,XER or XE1,
if you're not sure,post the reg number

I believe it’s XER. But the reg is SJ57UDP

 

[Leejohn01]

Ok that engine doesn't have a maf,just an inlet air temperature sensor,so that's why your app isn't reporting any airflow,
both of your codes are 02 sensor heater so would point to a power feed or earth problem,
i know you say F26 is intact but i would swap it out regardless,i'll get the 02 sensor pinout and post later,so you can unplug and check the voltage at the sensor and check the replacement 02 is wired correctly.

Haha that would make sense why it was 0. And the old sensor 2 gave a reading of around 0.45v on the mycarly.
After putting the new sensor it gives a reading of 1.2v and after a couple minutes it’ll then alternate between 1.2 and 0 for a little bit. and eventually just stay at 0v.
Also when testing the old sensor with a multimeter, the 2 white wires give me about 5.4ohms.
so I need to test the connector at sensor 2?

 

[Leejohn01]

All i can find i'm afraid,pin 3 (red/blue)is the 12v supply

View attachment 34829 View attachment 34830

Ahh okay so I need to get under and test pin 3 and hope I get a reading of 12v give or take?

 

[Leejohn01]

And check there's continuity between 1 & 3 on the sensor itself (should be the 2 white wires)

Ahh okay. On the old sensor it had some. So guessing the sensor wasn’t the problem. But thank you for everything! Much appreciated!