Code p2240
Rookie
Joined: Jan 2014
Posts: 61
Likes: 5
From: California
If your scanner can read the monitors you can graph the o2 sensors up and downstream and more or less get an area of where the fault is, O2 sensors read oxygen levels and compensate for the fault by adjusting fuel/air ratios. Faulty ground, vacuum lines, clogged injectors, or the sensor itself can all contribute to a faulty O2 sensor, although throwing a new one on will 75% of time fix it, there are other times that things maybe wrong and the sensor is simply advising you.
Pole Position
Joined: Oct 2014
Posts: 2,561
Likes: 365
From: New Hampshire
Truthfully it's probably just the sensor, if it wasn't there would be other codes to go along with it. You can do a visual inspection of the wires, this is the time of year mice love to eat wires in an engine compartment. It could be the heater circuit (bad sensor). If it's not the sensor it could be a million other things, but like I said, most of them will throw other codes.
Thread
Thread Starter
Forum
Replies
Last Post
Dan040286
ES - 1st to 6th Gen (1990-2018)
9
Aug 17, 2019 03:32 PM
techiedude
ES - 1st to 6th Gen (1990-2018)
11
May 2, 2012 06:57 PM
