help with trouble shooting

[chochocho]

check engine light came on after driving 80 mph on the freeway (regular cruising, no stomping on the gas, etc.)

got the following codes:

13 - cam angle sensor
23 - air flow sensor
24 air control valve
32 oxygen sensor
45 atmostpheric sensor

where should i start?

i cleared the code and see if it'll go back on. the car has not been driven in a while and just had a turbo installed.

thanks in advance.

[asc_up]

I would start with the 02 sensor. When mine started to go bad, the CEL for it would only pop on while I was on the freeway.

[log1call]

That's too many codes. Some of them are probably old codes, maybe caused by mechanics disconnecting things while they work. Clear all the codes and then go for another similar drive. When you get home recheck your codes.

That light can come on for some fairly simple thing like having an almost empty fuel tank with too many fumes in it.

Were there any other symptoms?

[chochocho]

nope, no other symptoms. the car ran decent even with the check engine light on.

i cleared the codes and then see if they come back.

[chochocho]

check engine light came on after driving 80 mph on the freeway (regular cruising, no stomping on the gas, etc.)

got the following codes:

13 - cam angle sensor
23 - air flow sensor
24 air control valve
32 oxygen sensor
45 atmostpheric sensor

where should i start?

i cleared the code and see if it'll go back on. the car has not been driven in a while and just had a turbo installed.

thanks in advance.

it's back on.....i do have an td05-18g with stock injectors. running wastegate pressure but i think it's more than 10 psi.

can you get these codes when running into fuel cut?

[log1call]

Well if you still have all those codes, those sensors are easy to check with a basic electrical meter.

If you can get it connected to a scanner or laptop the others can be observed in action to ascertain which is faulty.

I'd start with the cam angle sensor. All the others are interdependant and could be triggered by the cam signal being faulty. The other codes wont trigger a cam angle sensor code no matter how bad they get.

I'd check the cam angle sensor first and if it is all right I'd pull the ecu and inspect it inside, using a magnifying glass, looking for, leaking capacitors, burnt transistors, cracked circuit boards or exploded transistors.

[Legacy777]

Have you checked the codes again after the CEL came back on?

[chochocho]

yup. the codes are the same.

happens in 5th gear if i push it right past 10psi or so.

[n2x4]

I'd start with the cam angle sensor.

Would the car even start with a bad cam sensor?

[log1call]

There might be an intermittent fault in the cam sensor, the other codes might result from it. It would be strange that it only plays up under load though. Perhaps you have more than one fault.
You need to work through all those sensors confirming they are reading correctly right to the ecu. The subaru code reader can check the cam's signal as revs while it is driving, I'm not sure if it is the same revs a laptop or the rev counter would read though. The rest can be checked fairly simply.
If the cam missed a beat or two it would effect the ecu's idea of what the revs were and cause mixture and ignition problems, which could set all the other codes. If one of the other problems was the cause, that would not make the ecu think the cam wasn't turning.

[log1call]

If you go here... http://cid-4ca3c3459aaa7f7f.skydrive.li ... px/.Public
and have a look at "Diagnostic Aids For", it will perhaps give you some ideas...

[chochocho]

the check engine light clears itself the next day.