CAM positioning sensor been replaced but fuse keeps popping for engine 1?

WAYNEREEVES

MEMBER
1997 CHEVROLET S-10
3.4L
V6
4WD
MANUAL
180,000 MILES

So the first code that was thrilled was a po1 02 mass air flow sensor circuit low input, so I replace the mass air flow sensor, and another code popped up with the first code which was po340 which is the camshaft position sensor A circuit bank one or single sensor. And at this time, I realized that engine one fuse had popped so I replaced the camshaft sensor still the fuse pops after a delayed time of starting the engine approximately a minute later it'll pop. After clearing codes starting again with the fuse will pop again and the codes will come back on I did a voltage test on the mass air flow sensor and the cam sensor the mass air flow sensor had five on the control 5 volts under control side of it and the can had bolts on two of the wires coming to it.

Sunday, February 9th, 2025 AT 2:15 PM

1 Reply

AL514

MECHANIC
5,079 POSTS

Hello, where did you get the new MAF from? If it was from AutoZone or some other aftermarket location and the new sensor is now blowing fuses, I would put the old sensor on and just see if the new codes still come back. Many new parts these days are just junk and not made well at all. Especially electronics. I'm not sure of your last wording there in the last sentence, but the MAF should have 12v on the pink wire, and a Ground on the Black/White. Then signal on the yellow wire which is a frequency changing signal. Try the old MAF first and see if it's the sensor shorting out the circuit. Both the MAF and Cam sensor use that fuse. I wouldn't be surprised if you got a bad sensor but see what happens and let us know.

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Monday, February 10th, 2025 AT 7:58 AM