Check engine light after coolant change

[estipe]

Hello all,

I just flushed my coolant, replaced with Zerex G-05. However, when I was burping the system the check engine light came on. There appears to have been a sizeable bubble trapped in the system somewhere, because it took quite a while for it to surface. By the time the reservoir needed to be refilled, however, the light had been on for a while. Shop is closed this weekend and the auto parts store down the street can't read any thing older than a '96.

Here were my steps:

Drain via the lower radiator hose.
Reconnect, flush with distilled water.
Drain water, it was running clear by the end.
Reconnect, filled with coolant.
Brought up to temp, let run. (This is where the check engine light came on)
Let run longer, bumped the RPMs a bit, finally burped.

It appears to be running okay, and the temp gauge is maintaining a stead horizontal, 3oclock.

Any initial thoughts before I get the code read? Am I overlooking something?

Thanks,

Eric

[precopster]

These fives usually need multiple topups after warm/cool cycles to get their coolant level correct.

I suspect the engine code is for something entirely unrelated.

[mercuric]

Yup, probably unrelated.

On a 1995 you should have a little box under the hood that allows you to read codes via a little blinky LED:
https://www.matthewsvolvosite.com/read-codes-volvo-850