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I just finished a long project of rebuilding the engine in my 95 and everything is going okay except oil temp is only working on the digital guage and not the analog. I put a new sensor in and got this problem. It worked before I broke the old sensor removing it, and now the parts store said they can't exchange it because it's electrical. The guy at the parts store said they're all made in China regardless of brand. I can't just keep buying non returnable parts to find the actual problem. Is there a test to check it before I remove it. 🤔
To the best of my knowledge, none of the aftermarket sensors work for the analog gauge. The digital gauge seems to work alright. If you can find an OE sensor that will fix your problem. This thread has a couple of fixes that might be worth a try. https://www.corvetteforum.com/forums...p-senders.html
good luck and be sure to post if you find a solution
It worked before I broke the old sensor removing it.
If all that was broken was the shell of the body surrounding the pins, JB weld the piece back onto the body of the sensor and run it. << This is exactly what I did to the coolant sensor on my LT1 when I replaced the water pump. I did not want to risk unintended consequences by introducing a chinee part into the equation. I wanted to keep the sensor that I knew functioned correctly electrically.
I looked at the schematic of the circuit. The sensor has two outputs, one for the gauge, one for the ECM. I have no idea if the two sections of the sensor are the same electrically but if it were my problem to solve, I'd try swapping the two wires in the connector and see what the results are. There are codes in Module 4 associated with the ECM Engine Oil Temperature input. Code 52 and Code 62. The FSM for these codes has a temperature vs resistance chart for the sensor values. 70F is 3,400 Ohms. You might check both outputs and compare to that value for both your new and original sensor.
The thread is too large so off to Menards for an adapter number6805940 (3/8 in FIP x 1/4 in MIP). Thought I had it but the hex on the adapter interferes with the engine. I ended up putting the adapter in my drill press and removing the hex up about half way. This allows the adapter to thread all the way into the block. I’m sure if I tried a few different brass adapters I could find a solution without modifying the adapter but I was hot and sweaty so I didn’t feel like multiple trips to find different adapters. Plug in the connector and start the car, Check For Leaks!
my digital gauge and analog gauge now both work!
I wish I took pictures but again, Hot, Sweaty etc! Hope my description works.
Oil temp problem
