Replaced water pump today, then engine light comes on 3 miles down the road

[Peter DLM]

So, replaced the knackered water pump today, left the engine run for a few mins whilst topping up the fluids as it bled itself. All good.

3 miles down the road (after filling up fuel) the engine light comes on. Nothing unusal felt, heard or seen. Temps good etc, oil level fine etc.

Is this a co-incidence, or might I have done something wrong? What could go wrong, it was only a blummin' pump change!

 

[franey]

Did you disconnect anything electrical to change the pump?
Maybe an air lock causing a sensor to kick in?

 

[Peter DLM]

Hmmm, there was one thing I disconnected, I'll double check that.

I understood that the system bled itself? I may try 'burping' it tomorrow by squeezing a few hoses and see what happens.

 

[lynall]

Not sure what car you have but iirc if fuel cap left off can cause lamp to come on, fuel vapour recovery.



Lynall

 

[Peter DLM]

I've checked the fuel cap, reseated the connector that I removed, and done all I can to check that the water system is free of air, everything seems fine.

Another trip to the Star man.

 

[BlackC55]

it will be unrelated. Get the codes read asap!

 

[Peter DLM]

This was "B2007 - Intake Manifold Pressure Sensor"

Pulled all the vacuum hoses off I could, reseated them. Deleted the error, and after 20 miles or so the engine light is still off.

Maybe a glitch? Maybe a vacuum leak? Hopefully it won't reoccur.

 

[BlackC55]

Just monitor it. What equipment did you use?

 

[Peter DLM]

It was a Boston something or other, friend of a friend. Surprisingly easy to do actually.

 

[Peter DLM]

Light came back on today halfway down the A2.

I still got the 35mpg average I was expecting for the journey, so I'm thinking it isn't a big deal?

 

[BlackC55]

Get a Star on it. Other code readers cannot read all the codes properly. There maybe more stored.

 

[Zulu-Boy]

Fault codes normally clear themselves after the fault has been rectified.
It usually takes about 20 restarts before it resets.
Failing that, cancel the fault using Star Tech