dont know what this is .....please help

**RobertSS** · 06-13-2011, 06:03 AM

hi @ all !

write the problem in another thread......but know i am at the end of my knowledge......
SES codes shows :PO343,then PO342,PO336..and at least PO420....
Car runs when its cold perfekt......without any problems
When its warm and i would drive from a stop or i am in any gear,it feels horrible shakes with pops and backfire have no power and dies ......i can start it again and in neutral all runs good,but in any gear...under load....same problem ...
i change the fuel filter ......the front O2.....and cut the cats ,because i read PO420 often causes cat is clogged....
Can the code PO343 and 342 ( read its cam sensor) and PO336 ( crank sensor ) cause my problem ?
i clear all codes when i cut the cats and now i have no codes ,but the problem is the same

maybe a specialist here can help me ?

i have a spezialist here in austria but i can not drive to him now anymore....150miles away.....

greest Robert (Camaro 2001 SS 6-Speed )

**pajeff02** · 06-13-2011, 06:13 AM

Just a thought -- check the fuse labeled "ENG SENS". Strange that those would all be throwing codes at the same time.

**RobertSS** · 06-13-2011, 06:33 AM

hi ! i checked it and it was ok .........thanks for your idea

**JayTA98** · 06-13-2011, 12:17 PM

The crankshaft and cam sensor could cause these issues. Have you cleared the codes (erase them) and they still came back?

**RobertSS** · 06-13-2011, 08:25 PM

hi ! yes they come back,so tomorow i get a crank sensor and a cam sensor....first i will change the crank sensor......anything i have to look at ? i read to look first at the harness,because its near the exhaust under the starter......thanks Robert

**pajeff02** · 06-14-2011, 04:23 AM

Carefully inspect the wiring harness for any damage and also look at the connector to see if there is corrosion. Still seems odd to me that you are getting codes for both at the same time, idk.

**JayTA98** · 06-14-2011, 04:24 AM

Originally Posted by RobertSS

hi ! yes they come back,so tomorow i get a crank sensor and a cam sensor....first i will change the crank sensor......anything i have to look at ? i read to look first at the harness,because its near the exhaust under the starter......thanks Robert

yes inspect the wiring for melting or anything abnormal.

**JayTA98** · 06-14-2011, 04:25 AM

Originally Posted by pajeff02

Carefully inspect the wiring harness for any damage and also look at the connector to see if there is corrosion. Still seems odd to me that you are getting codes for both at the same time, idk.

I had my wifes car throw both codes when the crankshaft sensor was bad. Not saying that is the case but I had seen it before.

**pajeff02** · 06-14-2011, 04:27 AM

Originally Posted by JayTA98

I had my wifes car throw both codes when the crankshaft sensor was bad. Not saying that is the case but I had seen it before.

Interesting. We'll see how the OP makes out. If I get some time, I may take a look at my service manual to see if it says anything about one affecting the other.

**RobertSS** · 06-14-2011, 10:06 AM

thanks you all ! i will check it carefully......think tomorow i will get the crank sensor.....
yes i think also about the 2 codes as i read today about the cam/crank sensor ......
i will see it soon ......and hope my car runs strong again ....
and for the future i will by a real time scanner.....

robert

**SteveC** · 06-16-2011, 05:55 AM

I threw the P0336 code and the mechanic had to run the crank/cam relationship relearn on a Tech II machine, that solved the problem, never had it again (it has been 3 years).

SteveC

**JayTA98** · 06-16-2011, 09:53 AM

Originally Posted by SteveC

I threw the P0336 code and the mechanic had to run the crank/cam relationship relearn on a Tech II machine, that solved the problem, never had it again (it has been 3 years).

SteveC

is this somthing that needs to be done everytime you change one or both sensors?

**RobertSS** · 06-16-2011, 12:15 PM

mhhh what i understand its only when your PCM is custom tuned ?....i have to wait one week more,because i drive tomorow in holiday and the sensors did not come in time.....

**SteveC** · 06-17-2011, 03:32 AM

Originally Posted by JayTA98

is this somthing that needs to be done everytime you change one or both sensors?

Yes, it needs to be done if you only change 1 of the sensors

Originally Posted by RobertSS

mhhh what i understand its only when your PCM is custom tuned ?....i have to wait one week more,because i drive tomorow in holiday and the sensors did not come in time.....

Not true, worst case is that you have a damaged reluctor (sp) ring on the end of the cam shaft that rotates infront of the sensor.

SteveC