2013 chevy captiva 5 volt reference

Captiva has a 2.4 engine, first off the car seams to run fine when cold but once it warms up it runs ruff when I look at the scanner as it is warming up both the 5 volts reference 1 and 2 stay at 5 volts but once warmed up and when it runs ruff they are both highlighted in red 5 volt 1 now reads 5.01 and in read and 5 volt reference 2 reads 5.03 volts in red while warming up they are highlighted in black till it warms up and also temp reads 220 + once hot they both high light in read, I would think it's a sensor but I just have never seen this before any pointers would be appreciated, also the motor was just put in to a used engine.

...as it is warming up both the 5 volts reference 1 and 2 stay at 5 volts but once warmed up and when it runs ruff they are both highlighted in red 5 volt 1 now reads 5.01 and in read and 5 volt reference 2 reads 5.03 volts in red...

Which scan tool were you using when you saw this on the scan data?

Asking because Autel and Launch especially like to provide 'min-max' values for data PIDs. I really like the idea of providing a reference range, even when the OEM doesn't. But their provided values aren't always accurate, or realistic. You have to take them as suggestions rather than rules.

In the case of your 5V reference PID, I think 5.01V or 5.03V is entirely acceptable and not related to why the engine is running poorly. 5.03V is still a pretty solid 5V. The sensors that use that reference aren't going to malfunction over .03V.

...also temp reads 220 + once hot they both high light in read, I would think it's a sensor but I just have never seen this before any pointers would be appreciated, also the motor was just put in to a used engine.

If it's got a used engine in it, then everything is suspect. :silly: I'd say put the 5V thing aside for now and keep an eye on your high level indicators during a warmup. Fuel trims, O2's, high and low side fuel pressure (desired/actual), coolant temperature, cooling fan control, and misfire counts. Does the fan ever come on? Do you get hot air at the dash vents?

I did notice that i/ seamed like the ac was not working at one time but now is working i haven't noticed weather the is hot air coming from the vents..
I was leaning towards the timing chain cause it started with codes p0016,p0089,p0300and p228d because all codes are trimming chain codes but I cleared them and and the only code that came back was the p228d a fuel pressure regulator 1control performance-high pressure (symptom 00) so I omed the sensor #1 and it was bad so I changed it but still when the car is cold it's runs perfect so still when warmed up it stalls runs ruff and something like starts making noise like timing chain but I thought I found it I pulled the high pressure fuel pump and behind that the roller or what ever its called could shake it and it would rattle so pulled the 1 from old engine and it didn't rattle so I put it in but was better but still when gets hot starts to rattle again I'm going to pull valve cover and check timing this week but I personally don't think it the timing chain just because it runs so well when cold I'm just at a lose I just don't get why runs smooth till gets to like 225 in temp then runs ruff and rattles. I am using the autel ultra scan tool I also have a snap on verus