Help! check engine light alwasy come up in cold

[2JZDU]

Originally Posted by pwpanas

1) The garage you took it to sucks. If the check-engine linght comes on, there will be a code stored in your ecu.
2) What you've described seems to be a tough problem to diagnose. Perhaps a sticking idle-air control valve?

I'd suggest starting by reading your own codes:
http://www.mkiv.com/techarticles/eng...bd1_codes.html
http://www.mkiv.com/techarticles/eng...bd2_codes.html

I'd suggest you should also check for boost/vacuum leaks by pressurizing your charge-air system.

Tnak you, I will try to diganostic by my self.

another problem is, I started the car at afternoon, everything are nonrmal, no engine light, boost and rev are fine...this is completey doesn't make sense

does the car like to stay under sunshine????

[pwpanas]

Originally Posted by 2JZDU

Tnak you, I will try to diganostic by my self.

another problem is, I started the car at afternoon, everything are nonrmal, no engine light, boost and rev are fine...this is completey doesn't make sense

does the car like to stay under sunshine????

Until we find out your codes, it's all guesswork. It's possible that in cold weather, your IAC valve could be sticking. It's also possible that the IAC has nothing to do with the problem. See what I mean?

Please post the codes when you find them out.

[2JZDU]

Originally Posted by pwpanas

Until we find out your codes, it's all guesswork. It's possible that in cold weather, your IAC valve could be sticking. It's also possible that the IAC has nothing to do with the problem. See what I mean?

Please post the codes when you find them out.

finally found the problem, it was caused by the cam sensor.

now the car was fixed, great day.
thanks for all the help.

[pwpanas]

Originally Posted by 2JZDU

finally found the problem, it was caused by the cam sensor.
now the car was fixed, great day.
thanks for all the help.

Congratulations.

Just curious - weren't codes 12 and/or 13 stored in your ecu?

[2JZDU]

Originally Posted by pwpanas

Congratulations.

Just curious - weren't codes 12 and/or 13 stored in your ecu?

it was code 13

[pwpanas]

Originally Posted by 2JZDU

it was code 13

Did you fix it yourself? Also, did you (or the mechanic) determine why the cam sensors were failing when it was cold?

[2JZDU]

Originally Posted by pwpanas

Did you fix it yourself? Also, did you (or the mechanic) determine why the cam sensors were failing when it was cold?

I tool it to mechanic, cause I couldn't find any diagnosis tool around.

they didn't tell me when you found the code, but I guess the code which they found should be stored in ECU. casue They did they in the morning, and it's not cold.

but I srtill don't understand, what relation between cam sensor and cold weather....