Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
failed :( 04 nissan sentra 2.5 lack of power drive by wire
God bless you my brothers and sisters.
It's back sentra lack of power with codes p1122, p1121, p507, p0223, p0123, p2135 and p0731. With all these codes where should I start? The last time I replaced t/b from juck yard. I did not like that the car had no power on a slop sometimes but the customer said it was good and she took it. Now it's back and I'm coming here first before I do anything.
I Thank you for your help.
Hey Tyler thank you brother for your response, the car does not stall just on an up hill no power. I can floor it an no respond from the throttle and it is not all the time . I think the signal drops from throttle the engine will not rev over 2000, maybe I'm not explaining myself right with saying loss of power. Instead I should say loss of acceleration.
Thank you.
Last edit: 5 years 3 months ago by gilbert. Reason: had to add to comment
I would look at the commanded throttle position and actual throttle position live data and because the codes point to circuit faults do a tug and wiggle testing on the wiring.
I found a post elsewhere on the internet where am 03 Sentra had very similar issues that were apparently successfully diagnosed as an alternator issue :huh: In any event checking out the charging voltage with at minimum volt meter can't do any harm
community.cartalk.com/t/nissan-sentra-ac...rator-issues/72851/8
" We're trying to plug a hole in the universe, what are you doing ?. "
(Walter Bishop Fringe TV show)
5V and ground are shared between the two potentiometers. Because P0123 and P0223 are listed as 'circuit high' codes, I'd tend to suspect a ground problem. How's the pin fitment on the throttle body connector?
God bless you my brothers and sisters.
You know I haven't even checked the plugs because I have no misfire just no acceleration . When power braking will not rev pass 1000, to day I put a known good T/B and same thing. I will look tomorrow at the plugs, fuel pressure is good.
Thank You.
God bless you my brothers and sisters.
Hey Andy thank you for your responds brother here are some pic. of accel sen1 and 2 with thrtl sen 1and 2. On the scanner I get a respond but on the throttle nothing. At idle it does get a signal cause it revs just fine just under a load nothing. Today I put a known good t/b and same thing so I guess I now have to chase wires.
Thank you.
gilbert wrote: On the scanner I get a respond but on the throttle nothing. At idle it does get a signal cause it revs just fine just under a load nothing.
Wait, so KOEO the throttle will sweep normally? :huh:
God bless you my brothers and sisters.
I just reset the code will have to test drive when I get a chance. They don't come back as soon as I restart the car.
Thank you.
God bless you my brothers and sisters.
Just got back from a test drive no engine light on. The car is running a little better but it still bougs down( don't know if I spelled it right). I still get a loss of power on a up hill from a dead stop. If I power brake car does not rev pass 1000.
gilbert wrote: God bless you my brothers and sisters.
Just got back from a test drive no engine light on. The car is running a little better but it still bougs down( don't know if I spelled it right). I still get a loss of power on a up hill from a dead stop. If I power brake car does not rev pass 1000.
Gotcha. If none of the throttle body codes reset, then I'd argue that those codes aren't related to your low power concern.
I'd proceed with this symptom like the whole TB thing never happened. Start from scratch. Try to wind out first gear at WOT while observing throttle position, upstream A/F sensor(s), MAF, Alphas (fuel trims) and Calculated Load. See if you're dealing with a fuel issue, or a breathing issue.
Any transmission issues noted? I recall there was a 1st gear code in there somewhere. :huh: Is it starting out in 1st gear?
God bless you my brothers and sisters.
Monde I replaced the T/B, coils and cleaned the plugs and all is the same . I do have a Altima 2.5 with a blown head gasket so I'm just swapping parts to test.
