I just wanted to post my fix for OBD code P0116 - Coolant temp circuit out of range (or something similar)... First the short history with the happy ending...went for emissions and failed because they couldn't get any signal from the OBDII port. Turns out there was a recall to fix one of the pins, so had that fixed under warranty at Miller Motorcars. BUT also noted I didn't have ANY CEL...ah yes, some clever seller removed the darn thing. So stole a light from the seatbelt light, and it's on. 2 codes, air pump failure and water temp. Installed a used air pump and fixed that code. But the water temp sensor still tripped the CEL after some miles so had to fix that. So checked the WSM Vol. 1 and talked with Daniel at Ricambi...and decided it was the rear-most water temp sensor (seems there's more than one) near the oil filter. It's fairly easy to get to, just remove the center cover over the coolant tank first. Then lift the coolant tank up and out of the way. The sensor is sitting to the right of the oil filter. Remove the wire clip holding the connector on the sensor, then remove the connector. I stuffed a rag under the sensor knowing that coolant would drain out pretty quick as soon as the sensor is out. Maybe the right way to do it is to drain the whole system...be my guest. Instead I just worked fast - had the new sensor sitting right next to the installed bad one so I could grab it quick, threads wrapped with teflon for good sealing. You can fit the 3/4" socket in there if a few other electrical connectors are moved out of the way. Image Unavailable, Please Login Image Unavailable, Please Login
As a preventive measure, I replaced my coolant temp sensor as well a few weeks ago. It CAN be done without removing any of the stuff you did (granted, I have pretty small hands)...I used a couple extensions and such, and perfomed the swap. I did lose about 1 gallon of coolant, as I just couldn't work as fast as I thought, and like you, I had the new sensor all ready to go with a new copper crush washer. YMMV.
From the WSM it appears to only be for the ECU...in fact the sensor is made by Bosch. The gauge sensor would be a Veglia or something...
Yeah my mistake was not having a second copper washer. I was quick with the sensor switch, only lost a small bit of coolant caught in the rag. But afterward I noticed the copper washer that came out with the old sensor. I thought about taking the new sensor out to put the washer in but figured I'd just wait until it leaks (did use teflon tape though). This sensor is not for the gauge, mine read just fine even with the code. For that matter I have no clue what it really did since the car ran just fine before and after.
What it does, is tell the Motronic the engine is "cold" so it activates the cold idle speed to the idle control motor, just past the MAF. As the coolant temp comes up, it goes to the warm idle setting.
Ah ha, very interesting! Well then maybe it will help me, my idle was never that great. Seemed to idle a bit high, about 1100 rpm I think. But nothing near stalling like Goth talked about...thanks again for the info!
I don't know if the temp sensors are the same as on the 348 but you may find some useful numbers in this thread? http://ferrarichat.com/forum/showthread.php?t=229830 If not just take out the old one and then source it using the Bosch part number. When I did mine they cross referenced to a Volvo.
put crush washer back in. teflon tape can melt and then the sensor will leak and come loose. It depends on the rating of the teflon tape that's why copper washer is used.
So is this part: 148677 [148677 SENSOR/TEMP] #39 for the gauge and this part: 125769 [125769 SENSOR/WATER TEMPERATURE] #40 for the ECU? Image Unavailable, Please Login
Yes. Through searches on this forum, it seems that part #40 is bosch 0280130026 (sensor for the ECU) which is the same for the 348 and 355. Available from Ricambi, also from Rock auto. BTW, the local Ferrari dealer quoted me over $800 to change out the sensor. ($225 for the part and $600 labor. He said its so expensive because the cooling system needs to be drained and bled.) I like Uconn's method better for 1 hour of my time and $25 for the part.
Your dealer must be mistaken, I bought the sensor from Ferrari of Seattle, along with the copper crush washer, it was around $30 or so. And again, swapped out in a few minutes, lost some coolant, which I had to top up, no bleeding necessary.
BTW you are correct the sensor can be purchased online it is a common Bosch part# 0 280 130 026 What with shipping, it was easier for me to simply purchase from Ferrari of Seattle.
Obviously, do not shop there, or trust their information. Here is the pdf on the temp sensor 0 280 130 026 from Bosch. http://www.bosch-motorsport.com/pdf/sensors/temperature/NTC_M12.pdf
