P1094 Tumble Generated Valve Signal 1 Circuit Malfunction (Open) after turbo swap

**Sasquatch** · 07-25-2008 12:52 PM

I installed a Monster TD04 last weekend and I have had two instances of this error. I reset the ECU - the error goes away, but returns in a couple of days. Anyone have an idea as to why?

Thanks as always.

Edit: it is a P1095 - Tumble Generated Valve Signal 1 Circuit Malfunction (Short)

**Timdog1650** · 07-25-2008 01:06 PM

IBRoganpoststheFSM.pdf's

I would inspect to make sure you didn't knock the plug on the solenoid near the turbo. If it's loose/broken then you might get a TGV code, although admittedly I don't know if that's what the P1094 code references...

**SD_GR** · 07-25-2008 01:07 PM

You probably knocked something around while removing/replacing the turbo. Look on this thread for pics of how the setup is; the thread is about TGV deleting but doing that generates the CEL you got, unless you do as the thread says:

DIY TGV/Sensor Deletes. step by step(pics) - NASIOC

so look at the pics, look at your setup, and see what's come loose.

**Sasquatch** · 07-25-2008 01:17 PM

Ah, good info ... thanks.

BTW it was a P1095 - Tumble Generated Valve Signal 1 Circuit Malfunction (Short)

**Sasquatch** · 07-25-2008 04:38 PM

This looks to be the TGV sensor - the connectors seem OK.

I will try to have a better look at it tomorrow.

**DUB** · 07-25-2008 05:01 PM

You probably accidentally hit it with a wrench a borked it, just like Peaty: TGV Sensor CEL P1088 or P1086 - ScoobyMods

**Sasquatch** · 07-25-2008 05:10 PM

Originally Posted by DUB

You probably accidentally hit it with a wrench a borked it, just like Peaty: TGV Sensor CEL P1088 or P1086 - ScoobyMods

Very nice find - thank you ... however I am getting a P1095. Either way this is more for me to go on.

I do not recall abusing that widget or it being in the way.

**DUB** · 07-25-2008 05:14 PM

Originally Posted by 04.SPT.WRX

Very nice find - thank you ... however I am getting a P1095. Either way this is more for me to go on.

I do not recall abusing that widget or it being in the way.

Yeah, I did see that the codes weren't the same, I can't comment on that.

From reading Peaty's post though, it seems like you could have just tapped it with your ratchet handle or something and broken it. You certainly were messing around quite a bit in that area while swapping turbos.

**testes1010** · 07-29-2008 03:23 PM

how are you clearing the CEL? With a code scanner, AP or ECUExplorer or battery ground?

I know many times with TGV deletes/JDM Manifold the codes show up unless you reset the ecu by using the battery ground regardless how many times you reset the ecu using a AP,code reader, or ECUexplorer.

**Sasquatch** · 07-29-2008 03:30 PM

Originally Posted by testes1010

how are you clearing the CEL? With a code scanner, AP or ECUExplorer or battery ground?

I know many times with TGV deletes/JDM Manifold the codes show up unless you reset the ecu by using the battery ground regardless how many times you reset the ecu using a AP,code reader, or ECUexplorer.

I have used both battery and AP. This was not a delete, but a possible unknowingly banged up TGV sensor.

Thanks for your input.

**Donkey** · 07-29-2008 05:41 PM

Originally Posted by 04.SPT.WRX

I have used both battery and AP. This was not a delete, but a possible unknowingly banged up TGV sensor.

Thanks for your input.

I would try unconnecting and reconnecting.Maybe try putting alittle dielectric grease in the female plug and check the wiring to the plug for damage.You can also check the voltage across the sensor.It is basiclly just a TPS sensor.

**rr1911** · 07-29-2008 08:47 PM

check all 4 of the connections
there are 2 on each TGV

**Sasquatch** · 07-30-2008 01:13 PM

Originally Posted by Donkey

I would try unconnecting and reconnecting.Maybe try putting alittle dielectric grease in the female plug and check the wiring to the plug for damage.You can also check the voltage across the sensor.It is basiclly just a TPS sensor.

Already did the unplug / plug in. I cannot see any visible damage. After the last AP reset there has been no CEL, but think it will return. According to the Scoobymod thread the sensor is very tricky to remove and replace.

Your input is appreciated.

**Donkey** · 07-31-2008 04:09 AM

Originally Posted by 04.SPT.WRX

According to the Scoobymod thread the sensor is very tricky to remove and replace.

No need to remove.You just need an automotive digitial multimeter.The probes are designed to pierce the wire sheathing.You just jab the wire.You don't have to push the probe all the way through.Also if you have a Tactrix cable you should be able to monitor the TVG operation.Just enough to make contact.I have a few spare sensors if you end up needing one.Just shoot me a PM.

**Sasquatch** · 07-31-2008 02:32 PM

Originally Posted by Donkey

No need to remove.You just need an automotive digitial multimeter.The probes are designed to pierce the wire sheathing.You just jab the wire.You don't have to push the probe all the way through.Also if you have a Tactrix cable you should be able to monitor the TVG operation.Just enough to make contact.I have a few spare sensors if you end up needing one.Just shoot me a PM.

Wow, thanks ...

What values should I be seeing through the multimeter?