CEL Problem Persists Depsite Repairs

[thom4782]

I have a 2001 S. Several months ago, the CEL light came on with codes P0410 and P1411.

So far, I've done the following: 1) 90K service. 2) replace inoperable solenoid in passenger bank variocam, 2) replaced all valves and vacuum lines in secondary air ssystem, 3) replaced the air oil separator and its breahter hoses. The computer suggests the MAF and O2 sensors are operating within proper ranges. The air pump seems to work ok too.

Still, after each repair, the CEL popped back on. It always happens when the car has just started. After driving for a couple of minutes and less than a mile, I'll look down and see the CEL.

Anybody have any suggestions where to look next. I'd appreciate any suggestions.

Thanks

[Topless]

mileage? New error codes?
Here is a good ts guide for your old codes:
http://www.renntech.org/forums/topic/628-obd-ii-codes-p0410-and-p1411/

[thom4782]

Thanks. Milage is rougly 90965. According to the mechanic - no codes other than P0410 and P1411

[paulv]

Originally Posted by thom4782

Thanks. Milage is rougly 90965. According to the mechanic - no codes other than P0410 and P1411

Sent you a PM.

Regards,
paul...

[thom4782]

Thanks Paul for the follow-up.

The shop has worked its way through the entire flowchart and all things check out. Unless it's an intermittant electrical issue starting the air pump, it seems the only other thing to do is start replacing parts the computer says are working ok, i.e., the MAF and O2 sensors.

[teamwenz]

I would try cleaning your MAF first before replacing it. CRC makes a MAF spray cleaner. It's an easy job to do yourself. The MAF is easy to get at right next to your air filter.

[Johnny Danger]

Originally Posted by thom4782

Thanks Paul for the follow-up.

The shop has worked its way through the entire flowchart and all things check out. Unless it's an intermittant electrical issue starting the air pump, it seems the only other thing to do is start replacing parts the computer says are working ok, i.e., the MAF and O2 sensors.

If for some reason you decide to replace your MAF sensor, send me a pm and I'll share with you my experience with finding one on the cheap .

[turbo23dog]

I think change O2 sensors. I have a similar prob on my 00S. Try turning the key to "on" to allow the sensors to Warm up for a minute or so before starting.

[thom4782]

Well, changing the O2 sensors did not solve the P0410 and P1411 codes as many said it wouldn't.

So let me ask another question. I've looked at the secondary air system diagram and all parts are new and the hoses don't have vacuum leaks. So if a leak isn't there, where might I look to see where else can it be? I'm guessing that the vacuum is created in the intake manifold. What lines or other systems link to the secondary air system to provide vacuum there. I've replace the AOS as part of my CEL odessy.

Thanks