Sensor's? do i need to replace?

[MattEVans]

Good evening,

I appreciate your elp with my first post, not I have another.

I have purchased a code reader with live data, a couple of things.

1. My coolant temp never gets above 58 degrees, - would this be a temp sensor issue or a thermostat?
2. My catalyst temperatures are stuck even from engine start at senor 1 minus 40 degrees and sensor 2 2203 degrees, these figures never change.
3. EGR error is 99.219% with a command EGR 4.706%
4. The air flow from MAF at idle Is 13.3g/s

I have very poor MPG consumption, and wondered if you could provide some guidance on what to do. Many thanks

 

[johnsco]

The first thing I would do is to replace your thermostat.
Until you get the engine temperature up to its proper operating range (approx 80 degrees C), then your fuel consumptrion will continue to be poor.
Other readings are unlikely to be reliable.