Nissan Car 350Z & Maxima 1999-06

3.5L V6 VIN A Auto 4

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Trouble Code: P2123



Accelerator Pedal Position Sensor 1 Signal High Input

Possible Causes:



APP1 sensor connector is damaged (it may be open)
 
APP1 sensor signal circuit is shorted to VREF or system power
 
APP1 sensor signal circuit is damaged or has failed
 

Trouble Code: P2127



Accelerator Pedal Position Sensor 2 Signal Low Input

Possible Causes:



APP2 sensor connector is damaged (it may be shorted)
 
APP2 sensor signal circuit is shorted to ground
 
APP2 sensor signal circuit is damaged or has failed
 
PCM is damaged or has failed
 

Trouble Code: P2128



Accelerator Pedal Position Sensor 2 Signal High Input

Possible Causes:



APP2 sensor connector is damaged (it may be open)
 
APP2 sensor signal circuit is shorted to VREF or system power
 
APP2 sensor signal circuit is damaged or has failed
 

Trouble Code: P2135



Throttle Position Sensor Range/Performance

Possible Causes:



TP1 or TP2 sensor connector is damaged (open or shorted)
 
TP1 sensor signal circuit is open or shorted to ground
 
TP1 sensor signal circuit is damaged or has failed
 
TP2 sensor signal circuit is open or shorted to ground
 
TP2 sensor signal circuit is damaged or has failed
 
PCM is damaged or has failed
 

Trouble Code: P2138



Accelerator Pedal Position Sensor Range/Performance

Possible Causes:



APP1 or APP2 sensor connector is damaged (open or shorted)
 
APP1 sensor signal circuit is open or shorted to ground
 
APP1 sensor signal circuit is damaged or has failed
 
APP2 sensor signal circuit is open or shorted to ground
 
APP2 sensor signal circuit is damaged or has failed
 
PCM is damaged or has failed
 

Trouble Code: U1000



Controller Area Network Line Malfunction

Possible Causes:



CAN connector is damaged or is disconnected
 
CAN communication line is open, shorted to ground or to power
 
One of the modules is shorted and pulling the CAN voltage low
 

Trouble Code: U1001



Controller Area Network Line Malfunction

Possible Causes:



CAN connector is damaged or is disconnected
 
CAN communication line is open, shorted to ground or to power
 
One of the modules is shorted and pulling the CAN voltage low
 

 
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