2007 Nissan Sentra DTC P0123 & P0223

yeowguy

Sr. Member
Joined
Jan 22, 2007
Messages
188
Points
16
MAKE: Nissan
MODEL: Sentra
YEAR: 2007
MILES: 135,000
ENGINE
: 2.0L
DESCRIBE ISSUE....

I have a 2007 Nissan Sentra with the codes P0123 and P0223. When you start the car it idles rough and stalls right out. What could be causing this problem?
 

nickb2

Wrench. Diagnostic Tech.
Joined
Nov 22, 2008
Messages
12,010
Points
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Location
St-Hyacinthe, Quebec, Canada
Well, obviously, you are having a TP problem.

The two TP codes confirm the ECM has definable confirmed problem in the throttle circuit.

Best thing to do here is to make sure throttle plate is not sticking in gunk. Clean that linkage and TP plate as clean you can with some brake cleaner or carb cleaner. Sacrifice a old toothbrush for best results and no scratching of machined surfaces.

This is my bread and butter. Then connect an ohm meter and slowly depress the TP pedal and look for gaps/dips in the ohm-age.

Do not go throwing TP parts at this before cleaning. Screenshot (215).png
 

nickb2

Wrench. Diagnostic Tech.
Joined
Nov 22, 2008
Messages
12,010
Points
63
Location
St-Hyacinthe, Quebec, Canada
Since this is a fly by wire TP, we need to see voltages that the ECM is getting when actuating the TP.

Do you have a scanner capable of showing this????
 
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