BayAreaSS

iTrader: (10)

My SES light came on so i had the codes scanned and they are P0122, P0452 and P1416.

P0122: TPS pedal position sensor cir. low input..... I'm sure this has something to do with my nitrous system i just installed. I had to get a TPS signal so i tapped into the TPS wire off the cars PCM.

P0452: Evap emission control system pre sensor low......I have no idea what this means.

P1416: Malfunction secondary air injection system bank #1 diag.....

Can you guys help me figure out how to fix these problems. The car runs good but i just would like to get these taken care of.

Thanks

ZL1Killa

iTrader: (17)

secondary air is the air pump, its the thing under your car (if its lifted up) to the right of the air dam facing the front of the car, where there is the black plastic, something might be clogging it ..etc

evap is with the fuel tank/lines and such?? i think.... help me on this one

BayAreaSS

iTrader: (10)

Thanks, I'll check the air pump out.

2001NBMZ28

I had P1416 before, it was a clogged air check valve on the passenger side - easy to check/replace yourself. Don't know why the scanner said bank 1 diag, it's actually bank 2 - bank 1 would be P1415.

BayAreaSS

iTrader: (10)

WHere is the air chekc valve at in the engine bay?

2001NBMZ28

It's the black disc shaped valve in between the metal air tube coming off the exhaust manifold/then connects to the air hose, just above the #4 cyl coil. There's one just like it on the drivers side but further back towards the firewall. Disconnect the clamp, remove hose, then use two wrenches to unscrew it from the metal pipe. Some people replace both valves when one goes bad.

BayAreaSS

iTrader: (10)

Thanks i'll check it out

BayAreaSS

iTrader: (10)

anyone else?

BayAreaSS

iTrader: (10)

bump

2001NBMZ28

Well, you could look up the TPS and EVAP codes/diagnostics at gearchatter.com assumes you're stock though.

BayAreaSS

iTrader: (10)

Thanks for the site. I'll check it out tomorrow