P0452 code on 07 lariat 5.4l
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P0452 code on 07 lariat 5.4l
So I've dropped the fuel tank to check the connection on the ftps and the connector is good. I check to see if I had voltage going in to the sensor 2 wires my probe tester just reads (-) and the red wire with pink line just reads (0.00). I've checked the wire all the way up to underneath the dash and it's not cut or grounded, I would like to know where the wire is at on the ecm to see if I'm getting voltage coming out of the ecm. I would appreciate any help guys.
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I did test the system, first thing i changed was the gas cap. That is the reason it led me to drop the tank and check the connection on the sensor. Now I actually have to find the pin on the ecm to see if the ecm itself is sending the low voltage to the sensor for it to receive a signal.
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From: St Louis
Why aren't you looking at a system leak for pressure loss. Bad gas cap etc . Leaking hoses type thing .Sounds to me you may need a smoke test . Carbon canister vent valve working ?
I check to see if I had voltage going in to the sensor 2 wires my probe tester just reads (-) and the red wire with pink line just reads (0.00). I've checked the wire all the way up to underneath the dash and it's not cut or grounded, I would like to know where the wire is at on the ecm to see if I'm getting voltage coming out of the ecm.
GY/RD wire is the SIGRET (signal return). It should have continuity to chassis ground through the PCM.
BN/WH wire is the power feed supplied to the sensor from the PCM at pin 65. Should be around 5 volts.
RD/PK wire is the SIGNAL output to the PCM pin 44.At atmospheric pressure, it should read around 2.6 volts.
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James.
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Jun 15, 2014 09:16 AM
