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04 sentra po340 stored, only when cold Forums > > 04 sentra po340 stored, only when cold 04 sentra po340 stored, only when cold
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  #1  
Old 10-25-2008, 08:33 PM
theevette
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Exclamation 04 sentra po340 stored, only when cold

I've got an 04 sentra with po340 stored. Wont accelerate when the engine is cold. Engine acts like it is cutting of the spark or fuel. When engine warms up it runs perfect. I repaced MAF, Cam position sensors, o2 sensors, temp sensors, and checked cam shaft position sensor wiring for shorts. Has anyone run into this or have any suggestions. I'm tired of the guessing game. Maybe bad ECU?
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  #2  
Old 10-26-2008, 11:43 AM
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NissanTech NissanTech is offline
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Does your Sentra still has the acceleration problem or its just the code?

Have you had the sensors recall done? Knowledgebase - 2004 Sentra - Nissanhelp.com
The P0340 can also be triggered by bad starter or weak battery.
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  #3  
Old 12-11-2008, 09:58 AM
borys76 borys76 is offline
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hi I have same problem with sentra 02 47.000 miles dealer change camshaft and crankshaft but still i have 340 code and engine running rough no power,acceleration problem cant pass over 2500 rpm i forgot and he change maf sensor nothing help what else I can check ?
thank you

Last edited by borys76; 12-11-2008 at 04:57 PM.
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  #4  
Old 12-12-2008, 03:53 PM
borys76 borys76 is offline
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please let me know what else I can check I can't drive more then 5mph ,on nutral or parking engine runs smooth no problem but when I start acceleration no power and backfire can't pass 2000rpm still have 340 code
thank you for any answer
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  #5  
Old 12-14-2008, 10:39 AM
borys76 borys76 is offline
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now i got 2 codes 340 and 335 camshaft and crankshaft dealer keep the car for 3 days change crankshaft and camshaft 2 times , same problem i can't belive they give me car back and they did not fix the problem can't drive ,car does not have power ,bad acceleration , rpm go up and down like crazy
please sombody can help me maybe bad ecm computer?
sorry for my bad English but Im from Poland
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  #6  
Old 12-14-2008, 01:36 PM
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have they performed the ecm reprogram recall Knowledgebase - 2002 Sentra - Nissanhelp.com maybe this is what needed
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  #7  
Old 12-15-2008, 08:44 AM
borys76 borys76 is offline
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it is posible that dealer put crankshaft to camshaft,i take out camshaft sensor and i think its crankshaft the number its A29-630-BJ1 I have to pick up the car and see what he put in crankshaft but i belive he put camshaft or they are same part
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  #8  
Old 12-15-2008, 12:51 PM
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It is possible to swap the parts into the wrong locations.
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  #9  
Old 12-15-2008, 04:47 PM
borys76 borys76 is offline
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i was right crankshaft was in camshaft I swiched the parts start the car same problem no power can't acelerate then look at dealer invoice he changed veriable taiming control sensor too ,so i take out this sensor part number :A29-640-CJ0 check on internet and i can't belive this is RIGHT CAMSHAFT SENSOR FOR VQ35DE can't wait to see the dealer tomorrow i hope i found the problem but why the car start without problem with this sensor? and at the parking or nutral engine runs perfect only when start aceleration there is no power and looks like engine needs more gas
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  #10  
Old 12-19-2008, 03:19 PM
borys76 borys76 is offline
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I just back from dealer he put another sensors car does same thing no power can't accelerate burns alot gas still code 340 , he told me that looks like timing chain jumped so I have question if its posible that chain jump (car only have 45000) and start perfect , on nutral or parking runs smooth, he wants 2000$ to fix it.
I think that is ECM problem and he no want to change becouse its under warranty
any help please
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  #11  
Old 12-19-2008, 07:35 PM
ritter ritter is offline
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check ground wire to sensor. get a new battery
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  #12  
Old 12-21-2008, 03:29 AM
borys76 borys76 is offline
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changed battery , but dont know how to check ground wire?
thank you
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  #13  
Old 12-21-2008, 10:12 AM
borys76 borys76 is offline
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its possible that timing chain jump (car only have 45000)?
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  #14  
Old 12-22-2008, 08:19 AM
borys76 borys76 is offline
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just did compression test 150 150 150 175
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  #15  
Old 12-22-2008, 12:50 PM
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sergey85 sergey85 is offline
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from ondemand5

normal
1.8 192 psi
2.5 182 psi

minimum
1.8 168 psi
2.5 154 psi

maximum variation between cyl is 14psi

150 is kind of low and 175 the diff is 15 so might want to check it out, what engine do u got?
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