Infinity_QX4_1998-2003

TroubleCodes (11 of 11)

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3.5L V6 - Auto



Trouble Code: P1400

EGR Control Solenoid Circuit Malfunction:

Trouble Code Conditions: Engine started, engine running at cruise speed under light engine load, and the PCM detected an improper voltage signal from the EGR Control solenoid while the solenoid was being operated.

Possible Causes:



EGRC solenoid connector is damaged, open or shorted
 
EGRC solenoid control circuit is open or shorted to ground
 
EGRC solenoid control circuit is shorted to system power (B+)
 
EGRC solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P1401

EGR Temperature Sensor Circuit Malfunction:

Trouble Code Conditions: Engine started, engine running at light load in closed loop at over 5 mph, and the PCM detected the EGR Temperature sensor input was too low or too high when compared to the ECT sensor input.

Possible Causes:



EGR temperature sensor connector is damaged or shorted
 
EGR temperature sensor signal circuit open/shorted to ground
 
EGR temperature sensor signal circuit shorted to VREF
 
EGR temperature sensor is damaged or has failed
 

Trouble Code: P1402

EGR System Malfunction (Open) Detected:

Trouble Code Conditions: Engine started, engine running at over 5 mph at light engine conditions, and the PCM detected excessive EGR gas flow.

Possible Causes:



EGR valve seat leaking or EGR valve stuck in open position
 
EGRC solenoid is damaged or has failed
 
EGR temperature sensor is damaged or has failed
 
EGRC-BPT valve is damaged or has failed
 

Trouble Code: P1440

EVAP Canister System Small Leak (0.040") Detected:

Trouble Code Conditions: Engine started, vehicle driven at cruise speed at light engine load, and the PCM detected a small leak present in the EVAP system with the Purge and Canister Control Vent solenoids "on" in the Leak test.

Possible Causes:



Fuel filler cap loose, damaged or incorrect application
 
EVAP canister vent valve is damaged or contaminated
 
EVAP system leaks (in canister or related vapor lines)
 
EVAP control system vapor pressure sensor line is blocked
 
MAP/BARO switch solenoid valve is damaged or has failed
 
MAP/BARO switch solenoid vacuum line is blocked or bent
 
Fuel tank temperature sensor is damaged or has failed
 
Absolute pressure sensor is damaged or has failed
 

Trouble Code: P1441

Vacuum Cut Valve Bypass Valve Circuit Malfunction:

Trouble Code Conditions: Engine started, vehicle driven at cruise speed at light engine load, and the PCM detected an unexpected voltage on the EVAP Vacuum Cut Valve Bypass circuit during the CCM test.

Possible Causes:



EVAP vacuum cut valve bypass valve circuit is open
 
EVAP vacuum cut valve bypass valve circuit shorted to ground
 
EVAP vacuum cut valve bypass valve is damaged or has failed
 
PCM has failed
 

Trouble Code: P1443

Canister Control Vacuum Switch Circuit Malfunction:

Trouble Code Conditions: Engine started, vehicle driven at cruise speed at light engine load, and the PCM detected the EVAP Canister Control Vacuum Switch indicated off even without any vacuum supplied to the Purge valve.

Possible Causes:



EVAP canister control vacuum switch circuit is open
 
EVAP canister control vacuum switch is damaged or has failed
 
PCM has failed
 

Trouble Code: P1444

Canister Purge Volume Control Valve Circuit Malfunction:

Trouble Code Conditions: Engine started, vehicle driven at cruise speed at light engine load, and the PCM detected purge flow through the canister with the Purge Volume Control valve commanded closed during the test.

Possible Causes:



EVAP control system pressure sensor is damaged or has failed
 
EVAP purge volume control valve is stuck open
 
EVAP canister vent control valve is damaged or has failed
 
EVAP canister is damaged, or hoses are connected incorrectly
 

Trouble Code: P1446

EVAP Canister Vent Valve Closed Malfunction:

Trouble Code Conditions: Engine started, vehicle driven at cruise speed for 1-2 minutes, and the PCM detected the EVAP Canister Vent Valve remained closed.

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:

Trouble Code Conditions: Engine started, vehicle driven at cruise for 1 minute, and the PCM detected a leak between the intake manifold and the EVAP pressure sensor, or that the EVAP control system did not purge properly.

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):

Trouble Code Conditions: DTC P0442 not set, engine started, vehicle driven at cruise speed at light engine load, and the PCM detected the EVAP Canister Vent Control Valve remained open after the PCM commanded it closed.

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:

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected high voltage signal on the Fuel Level sensor ground circuit during the CCM test. This circuit normally reads near 0.00v with the key on.

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:

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected voltage condition on the EVAP Vacuum Cut Valve Bypass Valve circuit during the CCM test.

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:

Trouble Code Conditions: Engine started, ECT sensor signal from 41-86ºF, engine at idle speed or 70 seconds, and the PCM detected the Vacuum Vent Cut Valve/Bypass Valve did not operate properly during the CCM test.

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:

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected voltage on the Canister Purge Control Valve/Solenoid Valve circuit.

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):

Trouble Code Conditions: Engine running in closed loop under light engine load conditions, and the PCM detected that the EVAP Canister Purge Control Valve did not operate correctly (it may be stuck in open position).

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:

Trouble Code Conditions: Engine runtime over 30 seconds, system voltage more than 10.5v, and the PCM detected an incorrect or no signal on the A/T DLC line.

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:

Trouble Code Conditions: Key on or engine cranking, system voltage over 10.5v, and the PCM detected a problem in the Nissan Antitheft System (NATS).

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:

Trouble Code Conditions: Key on or engine cranking, system voltage over 10.5v, and the PCM detected a problem in the Nissan Antitheft System (NATS).

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:

Trouble Code Conditions: Key on or engine cranking, system voltage over 10.5v, and the PCM detected a problem in the Nissan Antitheft System (NATS).

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:

Trouble Code Conditions: Key on or engine cranking, system voltage over 10.5v, and the PCM detected a problem in the Nissan Antitheft System (NATS).

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:

Trouble Code Conditions: Key on or engine cranking, system voltage over 10.5v, and the PCM detected a problem in the Nissan Antitheft System (NATS).

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:

Trouble Code Conditions: Key on or engine cranking, system voltage over 10.5v, and the PCM detected a problem in the Nissan Antitheft System (NATS).

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:

Trouble Code Conditions: Engine runtime over 30 seconds, and the TCM detected the TP Switch input was too high or too low regardless of whether the Idle Switch was on or was off (accelerator pedal is depressed = off).

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:

Trouble Code Conditions: Engine started, vehicle driven to a speed of over 5 mph, and the TCM determined the PNP switch input was not plausible with the vehicle moving in a forward gear, or the signal did not change during the start to run transition.

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: P1760

A/T Overrun Clutch Solenoid Valve Circuit Malfunction:

Trouble Code Conditions: Engine started, vehicle driven at 55-65 mph and then back to idle, and the PCM detected an unexpected voltage condition on the A/T Overrun Clutch solenoid control circuit during the CCM test.

Possible Causes:



O/R clutch solenoid connector is damaged or has failed
 
O/R clutch solenoid control circuit is open or shorted to ground
 
O/R clutch solenoid is damaged or has failed
 
TCM or PCM has failed
 

Trouble Code: U1001

Controller Area Network Line Malfunction:

Trouble Code Conditions: Key on or engine running; and one or more of the controllers on the Controller Area Network (CAN) determined that it could not communicate for more than a specified time period. The Controller Area Network (CAN) is a serial communication line for real-time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. A vehicle can have several Electronic Control Modules, and each ECM shares information and links with other control units during vehicle operation (not independently). In CAN communication, control units are connected via two (2) communication lines (a CAN 'H' line and a CAN 'L' line) that allow for a high rate of information transmission with less wiring. Each ECM transmits and receives data, but still selectively reads only data that it requires.

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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