New EGR but EGR fault codes returned

[RB02259]

(2306) 2010 Insignia P0402 EGR Excessive flow - YouTube

Interesting will watch this in full later froma quick look pin out doesn't say voltages but looks possible 2 12 v supply is normal

[RB02259]

Ive just had a look in my haynes manual and the wiring diagram is pretty basic and doesnt cover the EGR valve.

Im only guessing but 1 of the 12v would be for power, The other 12v might be to open it, or close it. The 5v might just be the signal or linked to the Fault code system and the other 2 that are 0v could be waiting for a signal from other sensors/ soleniod that also use/ control the EGR valve?

Like i said, just a guess and probably utter rubbsih

Thanks for looking mate gonna get on the ringer to a mechanic. It's impossible to do much in absence of proper schematics and also conscious of applying power and frying ecu or something during a test

Will let yous know what they say as always incase helpful for future ref

[justin43]

(2306) 2010 Insignia P0402 EGR Excessive flow - YouTube

[justin43]

Hi all

So turned ignition to position 1
Grounded one side of multometer and took some voltage readings with the plug disconnected

there are 5 wires i got

12.21 v
12.21 v
5v
0v
0v

Obviously it's hard without wiring diagram but I wasn't expected to find two wires at 12v and I noticed they both read exactly the same

This has me thinking one of these is signal and it's a dead short to the main 12 v supply

Any thoughts on this idea?

Ive just had a look in my haynes manual and the wiring diagram is pretty basic and doesnt cover the EGR valve.

Im only guessing but 1 of the 12v would be for power, The other 12v might be to open it, or close it. The 5v might just be the signal or linked to the Fault code system and the other 2 that are 0v could be waiting for a signal from other sensors/ soleniod that also use/ control the EGR valve?

Like i said, just a guess and probably utter rubbsih

[RB02259]

Hi all

So turned ignition to position 1
Grounded one side of multometer and took some voltage readings with the plug disconnected

there are 5 wires i got

12.21 v
12.21 v
5v
0v
0v

Obviously it's hard without wiring diagram but I wasn't expected to find two wires at 12v and I noticed they both read exactly the same

This has me thinking one of these is signal and it's a dead short to the main 12 v supply

Any thoughts on this idea?

[RB02259]

Have you tried looking into the EGR actuator and also EGR valve soleniod?

I remeber seeing a video on Youtube about it while i was searching for my EGR issues and it was very interesting and seems to be a part that some people either done know about or overlook. The EGR system is a bit more complex that my old Vectra C

Thanks no I haven't I thought the solenoid and actuator was all in the main valve which is electronically controlled but not certain

[justin43]

Have you tried looking into the EGR actuator and also EGR valve soleniod?

I remeber seeing a video on Youtube about it while i was searching for my EGR issues and it was very interesting and seems to be a part that some people either done know about or overlook. The EGR system is a bit more complex that my old Vectra C

[RB02259]

Depends on how many wires you have but you are right
You should have 12v Feed
5v reference circuit.
Signal wire ( which will either go up or down in power depending on position.)
And maybe 2 ground wires.
You can check for voltage buy using a test light .
Put one side on battery negative
Then probe the wire's and see which light the test light.

Thanks my lizzard I've been busy recently but will delve into it ASAP and post my findings to extent helpful for others

[lizzard-t]

Depends on how many wires you have but you are right
You should have 12v Feed
5v reference circuit.
Signal wire ( which will either go up or down in power depending on position.)
And maybe 2 ground wires.
You can check for voltage buy using a test light .
Put one side on battery negative
Then probe the wire's and see which light the test light.

[RB02259]

Sorry all I haven't been online we had terrible storm in NI

Still looking into this

I agree with lizzard I think this is an open in wiring

I've had a quick look at harness into egr and back to ecu in obvious places eg whete conduit is broken and high stress areas and see nothing

It could be internal break

I now either want to try some continuity tests or test voltages by back probing sensor

Anyone got a wiring diagram I know it should be 12 v 5 v ref then a signal and two grounds right ?

Best

Ryan

[lizzard-t]

Broken wire somewhere.
As I stated before.its a wiring code.
Not a component code .

[flusher]

below error it says open. shouldn't that mean open line / open circuit like wire coming off somewhere?

[G!zzard1533]

What about your MAP, MAF and intake temperature sensor are they clean and reading correctly?

[RB02259]

Have you cleaned the metal pipe between the egr and inlet manifold?

I gave it a quick clean when replaced egr valve but wasnt scrupulously thorough tbh

[lizzard-t]

It's a control circuit fault as said before ( electrical fault)
Looking at the wiring won't show you the fault.
If you are not ok with wiring then a good auto electrician will be able to track it down.