Secondary Air Pump Q - Loren, Tp?

[karlooz]

i have been driving with the CEL light on for the past month. i scanned it with an OBD II scanner and found it was triggered by the secondary air pump (error code 410). i haven't brought it in yet cause it only an emmission thang.

after finding out the cause of the CEL, i cleared it and low and behold the CEL was triggered again but only after the engine was warm and i had been driving a while.

i guess my question is should the secondary air pump even go on at all after it has been driven a while and cold. i notice/hear it go on at a stop after i get off the freeway. i thought it would only go on during a cold start up.

any ideas? does anyone notice the pump go on when warm?

tia

carlos :help:

[Loren]

i guess my question is should the secondary air pump even go on at all after it has been driven a while and cold. i notice/hear it go on at a stop after i get off the freeway. i thought it would only go on during a cold start up.

That is pretty normal to come on at idle after coming off the freeway. It is all based on the O2 measurement before and after the cats.

Since you say it comes on at idle when you start it up I would look for a loose or worn wires and supply air/vacuum lines. If you are getting an error code then it means that it can not adjust the air injection mixture. This is usually a leaking line or faulty changeover valve. The valves are operated by solenoids so it could also be wiring or a solenoid that is failing when it is hot.

[karlooz]

loren,

actually i miss wrote. after clearing the CEL and starting up cold, the light does not come on. it may take a day for the CEL to come on but not upon cold startup but only when warm and driven a while.

anyhow, i'll check for loose wires and vacuum lines and maybe check out the relay.

thx again,

c