P2234 Signal Shorted to Heater Circuit and other problems see post #4

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BlackT

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	P2234 Signal Shorted to Heater Circuit and other problems see post #4 « on: June 22, 2022, 12:42:55 PM »

I am getting this error on 4.2 MPI ME7.1.1
4F0 910 560
It use LSU 4.9

I try everything, few difrent LSU, new wires to LSU,second ECU. Now I try it on bench I only connect to ECU: RPM signal and LSU. I simulate AFR with LPG from ligther

I am geting all time this dips on WBO signal, same is on car.

There was bad WBO on car, maybe it fired both ECUs?


« Last Edit: July 03, 2022, 11:40:19 AM by BlackT »	Logged

BlackT

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	Re: P2234 Signal Shorted to Heater Circuit « Reply #1 on: June 22, 2022, 12:46:28 PM »

And this is on car
If I discconect wire to LSU heater I dont get this dips

Second bank work without problems


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BlackT

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	Re: P2234 Signal Shorted to Heater Circuit « Reply #2 on: June 23, 2022, 04:41:44 AM »

This is getting more strange.
So all time I have problem on BANK 2, I was sure that is something in ECU on that bank.

But today I connect bank 1 sensor to bank 2 connector on ECU. And is working, there is no dips

How is possible that I have 3 used LSU sensors, with same problem? It is no problem to put new sensor, but I am afraid to ruin it. If something else is problem


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BlackT

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	Re: P2234 Signal Shorted to Heater Circuit and other problems see post #4 « Reply #3 on: July 03, 2022, 11:55:49 AM »

This is getting more weird and weird

Soo on Bank 1 at idle I have all time lean mixture, and no mather how much I add fuel it doesn't get to 14.7(fuel pressure tested is okay). Like one cylinder is not working but I don't get any missfire detection. And I can feel in car like is not 100% smooth idle
First strange thing:
When I put my extrenal AFR meter in bank 1 exhaust pipe(back of car), I get AFR reading of 20:1(like free air)
If I put metter in other pipe It read around 15-16 AFR

Why second O2 show 0.45V, they are dead or what?

when I drive car,at WOT AFR is good, but... I read only 145 g/s at MAF. TPS is 100% open, AIR filter is new, car goes like it have 180HP

Can this be problem beacuse I turned off VVT. I dont think so

Also It have this peaks at MAF reading

Car dont have CATs

I try another WBO and still have this dips, all that WBOs work without problem with extrenal AFR meter


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BlackT

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	Re: P2234 Signal Shorted to Heater Circuit and other problems see post #4 « Reply #4 on: July 03, 2022, 12:43:06 PM »

and here is WOT


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BlackT

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	Re: P2234 Signal Shorted to Heater Circuit and other problems see post #4 « Reply #5 on: July 06, 2022, 06:11:16 AM »

Maybe this can explain some things Cool

Every piston have this nice kiss


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