Pre Cat O2 sensor
Thread Starter
|
Veteran
Joined: Aug 2010
Posts: 403
Likes: 0
From: Columbus, Ohio
Coolant temp sensor is mainly used while the vehicle is warming up. Once it surpasses the required temp, the coolant sensor has no value (of interest). The O2 sensor picks up, once the probe is about 600 degree's (changes depending), there are other sensors, but going by your specific question, one of your sensors are losing output. You should study the lambda principle if you want to learn about the EFI sensors affects (aptly named "The Brettschneider equation") . Try a data scanner to see if you get any codes.
Captain
Joined: Oct 2010
Posts: 579
Likes: 1
From: Florida
Yes, but if it does "as often" in both warmths, then the sensors may not be the problem.