Spink

iTrader: (1)

Car sat all winter and got it out yesterday and ses light came on with these 3 codes. I hear the air pump turning on and off constantly as well not just at start up like normal.

Rear o2 heaters and air pump are what the codes read. So is my problem the o2s, the pump, or something else. Where should I start?

demonspeed

iTrader: (7)

Probably AIR check valve (the black circular things in the AIR pipes off the manifolds). They get clogged after time and will set multiple codes with the emissions. I had the same issue when I bought my car. I've got a couple extra valves I could send you if you'd want them. Just shoot me a PM

Spink

iTrader: (1)

I've had to replace a few in the past and it usually just threw one code for me saying it was the check valve. The one was replaced just last year, less than 1500 miles ago. The other probably has less than 5000 on it. Hard to believe they'd both be bad already. Usually I get at least 35-40k out of them.

Ill give it a look this weekend though. Easy enough to check I guess. And many thanks for the generosity.

Ill post back this weekend

strick 9

Just wondering if & how these codes were resolved ? I have the same on my 02' Z28

Spink

iTrader: (1)

Updated: solved!

It did end up being a check valve.