EGR voltage reading only 5 volts.....

[cpl hero]

Recently my check engine light came on. So I flashed the ECU and pulled a egr valve code. I checked the voltage on the egr connector and I only have 5 volts . I thought It was supposed to get a 12 volt signal from the ecu. Could it possible be a problem with the ecu or is it supposed to be 5 volts power to the egr. Thanks in advance...

[turbo90accord]

almost all sensors on our cars work on 5v signals some have 12v power but ecu's usually especially when it comes to sensors 5 volts. remember that things in cars are ground controlled so source power is usually not given from the ecu it comes from somewhere else.

as far as your egr problem you may just want to clean out your egr system. or remove your egr and make sure it is moving internally.

[cpl hero]

Thanks dude, that's what i was hoping. I had been reading a few manuals and the chiltons said it was 12 volts. That seemed a little high to me but I figured i'd ask around before I made a move on anything.

[NAiL05]

Depends on the sensor. But as mentioned most have a 5v reference. Some dont.

[JTEK24]

I just checked mine CEL again. I just looked in the DIY section for the TPS fix, did that and my car was idling fine. Then I drove it for about 5 minutes and the CEL just came back on Now not only am I getting a 7-TPS code, Im getting a 12-EGR code. Apparently I will have to replace the TPS, but can the idle adjuster screw cause the EGR valve to throw a code?

[turbo90accord]

no its an unrelated system and the idle screw has nothing to do with the egr.