Bad Temp sensor???

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Sep 10, 2006
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Bad Temp sensor??? P0402 Code

On colder days if I don't let my 1997 cruiser fully warm up before I start driving, I get a check engine light. If I let it warm up before driving (approx 10 mins) ,,,then the check engine light never comes on. Is this the sensor that triggers the check engine light?
I'm having a P0402 code. Something like excessive flow issue.
I've already replace my EGR valve and modulater.
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May 31, 2010
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Southern California
The code you have sounds incomplete, can you recheck the code and get the exact description so that we can try to diagnose the issue and also so that the others will chime in
 
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I've got it reset for now, but once it comes back on, I will update it.
 
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OK. So, I get a P0402 Code.
Any help would be appreciated. Thanks.
 
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bump...
 

TrickyT

Hate that mud...
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Mill Valley, CA
Use the search feature. P0402 has probably been covered as much as any other topic. I'll bet you can find at least 50 different threads.
 
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Will do. Thanks.
 
Joined
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Btw, I found out that the small pipe on the TB is clogged. I tried the paper clip thing, no go.
Next I will try the 2.5" 15 gauge finishing nail and small hammer trick. Gonna have to find that at the local hardware first. BUt.....
any other tricks that folks have tried and worked?
 

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