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Blown ENG SEN Fuse, troubleshooting results inside...

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Old 09-28-2014, 03:19 PM
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Default Blown ENG SEN Fuse, troubleshooting results inside...

Okay so I know what components are on this fuse. I hooked up a DMM from the fuse to ground in "beep" mode. Disconnected the 4 02 sensors and the skip shift solenoid, couldn't get the reverse lockout solenoid connector off but does not matter.

With these disconnected, no short to ground. As soon as I connect anyone of the 4 02 sensors, it's shorted to ground.

Anyone have an idea what would cause this? I can see one bad 02 causing the problem, but this is tied somehow to all four?

Thanks up front.
Old 09-29-2014, 10:46 AM
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Look for melted O2 sensor wires. Do you have any exhaust modifications or places where the O2 wires could be touching hot spots?
Old 09-29-2014, 07:40 PM
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Originally Posted by wssix99
Look for melted O2 sensor wires. Do you have any exhaust modifications or places where the O2 wires could be touching hot spots?
I have shorty headers but I thoroughly looked over all four 02 sensor leads and did not see anything wrong.
Old 09-30-2014, 02:08 PM
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I was experiencing the ENG SEN fuse issue (along with the turn signals/reverse lights fuse) and had chased down every exposed spot I could locate on the O2 sensor wires with no luck; as it turned out, my dipstick tube had moved and was arcing massively against a coil pack bolt and assorted wiring on the passenger side of the engine bay.
Old 10-01-2014, 08:10 AM
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Originally Posted by fruitsalad
I was experiencing the ENG SEN fuse issue (along with the turn signals/reverse lights fuse) and had chased down every exposed spot I could locate on the O2 sensor wires with no luck; as it turned out, my dipstick tube had moved and was arcing massively against a coil pack bolt and assorted wiring on the passenger side of the engine bay.
Worth checking, thanks.



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