Infiniti Car 1998-05

4.1L V8 - Auto 3

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Trouble Code: P1446



EVAP Canister Vent Valve Closed Malfunction:

Possible Causes:



EVAP canister vent control valve is damaged or has failed
 
EVAP canister vent control valve rubber tube is blocked
 
EVAP control system pressure sensor is damaged or has failed
 
EVAP water separator is damaged or has failed
 
EVAP canister is saturated with water
 

Trouble Code: P1447



EVAP Control System Purge Flow Malfunction:

Possible Causes:



EVAP canister purge volume control valve stuck closed
 
EVAP canister purge control valve stuck closed
 
EVAP control pressure sensor is damaged or has failed
 
EVAP canister vent control valve is damaged or has failed
 
EVAP rubber tube is blocked, disconnected or bent
 
EVAP canister purge control solenoid is damaged or has failed
 
MAP/BARO switch solenoid vacuum line is blocked or bent
 
EVAP canister is leaking (it may be cracked)
 
EVAP 1-way valve connected improperly or purge port blocked
 

Trouble Code: P1448



EVAP Canister Vent Control Valve Malfunction (Open):

Possible Causes:



EVAP canister vent control valve is damaged or has failed
 
EVAP control pressure sensor is damaged or has failed
 
EVAP canister vent control valve rubber tube is blocked
 
EVAP water separator has failed or canister is full of water
 
EVAP vacuum cut valve is damaged or has failed
 
TSB 00-046 (7/00) contains information related to this code
 

Trouble Code: P1464



Fuel Level Sensor Ground Circuit Malfunction:

Possible Causes:



Fuel level sensor signal circuit is open or grounded
 
Fuel level sensor circuit is shorted to VREF
 
Fuel level sensor is damaged or has failed
 

Trouble Code: P1490



EVAP Vacuum Cut Valve Bypass Valve Circuit Malfunction:

Possible Causes:



EVAP vacuum cut valve bypass valve connector is damaged
 
EVAP vacuum cut valve bypass valve control circuit is open
 
EVAP vacuum cut valve bypass valve control circuit is shorted
 
EVAP vacuum cut valve bypass valve is damaged or has failed
 
PCM is damaged
 

Trouble Code: P1491



EVAP Vacuum Cut Valve/Bypass Range/Performance:

Possible Causes:



EVAP vacuum cut bypass valve is damaged or has failed
 
EVAP vacuum cut valve is damaged or has failed
 
EVAP control system pressure sensor damaged or has failed
 
Vapor hose between fuel tank and cut valve is blocked or bent
 
Vapor hose between canister and vacuum cut valve is plugged
 
EVAP canister is damaged or EVAP purge port at tank is dirty
 
TSB 02-015 (3/02) contains information that relates to this code
 

Trouble Code: P1492



EVAP Canister Purge Control Solenoid Circuit Malfunction:

Possible Causes:



EVAP canister purge control solenoid control circuit is open
 
EVAP canister purge control solenoid control circuit is shorted
 
EVAP canister purge control solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P1493



EVAP Canister Purge Control Solenoid Performance (Stuck Open):

Possible Causes:



EVAP canister purge control valve is damaged or has failed
 
EVAP canister purge control solenoid valve is damaged/failed
 
EVAP vacuum hoses are clogged or disconnected
 
EVAP canister vent control valve is damaged or has failed
 
EVAP canister is full of water, or the vapor separator has failed
 

Trouble Code: P1605



TCM A/T Diagnosis Communication Line Malfunction:

Possible Causes:



TCM communication line circuit is open or shorted to ground
 
TCM communication line circuit shorted to VREF or power (B+)
 
TCM or PCM has failed
 
TSB 01-002 (1/01) contains information related to this code
 

Trouble Code: P1610



NATS Initialization Failure:

Possible Causes:



Refer to the information that explains how to diagnose a problem in the NATS (system) - use a compatible Scan Tool.
 

Trouble Code: P1611



NATS ID DISCORD, IMM-ECM:

Possible Causes:



Refer to the information that explains how to diagnose a problem in the NATS (system) - use a compatible Scan Tool.
 

Trouble Code: P1612



NATS CHAIN OF IMMU-ECM:

Possible Causes:



Refer to the information that explains how to diagnose a problem in the NATS (system) - use a compatible Scan Tool.
 

Trouble Code: P1613



NATS ECM INT CIRC-IMMU:

Possible Causes:



Refer to the information that explains how to diagnose a problem in the NATS (system) - use a compatible Scan Tool.
 

Trouble Code: P1614



NATS CHAIN OF IMMU-KEY:

Possible Causes:



Refer to the information that explains how to diagnose a problem in the NATS (system) - use a compatible Scan Tool.
 

Trouble Code: P1615



NATS IDIFFERENCE OF KEY:

Possible Causes:



Refer to the information that explains how to diagnose a problem in the NATS (system) - use a compatible Scan Tool.
 

Trouble Code: P1705



Throttle Position Sensor Circuit Malfunction:

Possible Causes:



TP sensor signal circuit is open between the sensor and TCM
 
TP sensor signal circuit is shorted between sensor and TCM
 
TP sensor is damaged or has failed
 
TCM has failed
 

Trouble Code: P1706



A/T Park Neutral Position Switch Circuit Malfunction:

Possible Causes:



PNP switch signal circuit is open or shorted to ground
 
PNP switch is shorted to VREF or system power (B+)
 
PNP switch or the PNP relay is damaged or has failed
 
PCM has failed
 

Trouble Code: P1754



A/T Overrun Clutch Solenoid Valve Circuit Malfunction:

Possible Causes:



Overrun clutch solenoid control circuit is open
 
Overrun clutch solenoid control circuit is shorted to ground
 
Overrun clutch solenoid is damaged or has failed
 
TCM has failed
 

 
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