Nissan Car Altima & Sentra 1999-06

2.5L L4 - Auto 3

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Trouble Code: P1275



Air Fuel Sensor (Bank 1 Sensor 1) Slow Response

Possible Causes:



Air Fuel Sensor (AFS) is damaged or has failed
 
Air Fuel Sensor (AFS) heater is damaged or has failed
 
Fuel system problem (high fuel pressure, leaking injectors)
 
PCM has failed
 

Trouble Code: P1276



Air Fuel Sensor (B1 S1) Lack Of Activity Detected

Possible Causes:



Air leaks after the MAF sensor, or leaks in the PCV system
 
Air Fuel Sensor (AFS) or its heater is damaged or has failed
 
Fuel system not supplying enough fuel under high fuel demand conditions (i.e., fuel pump weak, fuel filter or fuel injectors dirty)
 
Air leaks at the EGR valve or in the Intake Manifold area
 
Exhaust system leaks before or near the AFS1 location
 

Trouble Code: P1277



Air Fuel Sensor (Bank 1 Sensor 1) Heater Circuit Malfunction

Possible Causes:



Air Fuel Sensor heater control circuit is open
 
Air Fuel Sensor heater control circuit is shorted to ground
 
Air Fuel Sensor (AFS) heater is damaged or has failed
 
PCM has failed
 

Trouble Code: P1320



Ignition Control Signal Circuit Malfunction

Possible Causes:



Ignition coil primary circuit is open or shorted
 
Ignition coil condenser is shorted
 
CKP sensor signal is erratic or missing
 
CMP sensor signal is erratic or missing
 
CKP sensor or CMP sensor is damaged or has failed
 
TSB 01-159 (6/01) contains information related to this code
 

Trouble Code: P1335



Crankshaft Position Reference Sensor Circuit Malfunction

Possible Causes:



CKP reference signal circuit is open or shorted to ground
 
CKP reference sensor is damaged or has failed
 
Starter motor or starter motor circuit is damaged (not working)
 

Trouble Code: P1336



Crankshaft Position Sensor Circuit Malfunction

Possible Causes:



CKP POS signal circuit is open or shorted to ground
 
Engine flywheel or drive plate gear tooth is chipped or damaged
 
Crankshaft position (POS) sensor is damaged or has failed
 

Trouble Code: P1400



EGR Control Solenoid Circuit Malfunction

Possible Causes:



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

Possible Causes:



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
 
PCM has failed
 

Trouble Code: P1402



EGR System Malfunction Detected (Open)

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

Possible Causes:



Absolute pressure sensor is damaged or has failed
 
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
 
Fuel filler cap loose, damaged or incorrect application
 
Fuel tank temperature sensor is damaged or has failed
 
MAP/BARO switch solenoid valve is damaged or has failed
 
MAP/BARO switch solenoid vacuum line is blocked or bent
 

Trouble Code: P1441



EVAP Control System Very Small Leak (0.020") Detected

Possible Causes:



Absolute pressure sensor is damaged or out-of-calibration
 
Blocked or bent EVAP purge line rubber tube
 
Blocked rubber tube to the Control System Pressure Regulator
 
Canister Vent Control valve O-ring is missing or damaged
 
Canister Purge valve is damaged, leaking or has failed
 
Charcoal canister is loaded with fuel or it contains moisture
 
Control System Pressure sensor is damaged or has failed
 
Dirt or debris caught in the Canister Vent Control valve
 
Fuel filler cap loose, cross-threaded, incorrect part or damaged
 
Fuel level sensor is damaged or out-of-calibration
 
Fuel tank is cracked (leaking), or a leak exists in the 'O' ring
 
Fuel tank pressure sensor is damaged or has failed
 
Fuel vapor line(s), fuel pipes or hoses damaged or leaking
 
Incorrect Fuel Tank Vacuum Relief valve
 
Leaks in the EVAP canister or related hoses, or in the fuel tank
 
Leaks present in the system between the intake manifold and the Canister Purge Volume Control solenoid valve
 
Leaks present somewhere in the ORVR system components
 
Problems in the Canister Vent Control solenoid or its circuit
 
Problems related to the water separator valve
 
Refueling Control Valve is damaged, sticking or has failed
 
PCM has failed
 

Trouble Code: P1444



Canister Purge Volume Control Valve Circuit Malfunction

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 Malfunction (Closed)

Possible Causes:



Charcoal canister is saturated with fuel or moisture
 
Control system pressure sensor is damaged or has failed
 
Canister vent control valve is damaged or has failed
 
Canister vent control valve rubber tube is blocked/bent
 
Water separator is damaged or has failed
 
PCM has failed
 

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 00-060 (7/00) contains information related to this code
 

Trouble Code: P1464



Fuel Level Sensor Circuit High Input

Possible Causes:



Fuel level sensor signal circuit is open
 
Fuel level sensor circuit is shorted to VREF or system power
 
Fuel level sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P1490



EVAP Vacuum Cut Valve Bypass Valve Circuit Malfunction

Possible Causes:



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 Circuit

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 02-033 (3/02) contains information related 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 (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
 
TSB 00-060 (7/00) contains information related to this code
 

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 01-004 (01/01) contains information related to this code
 

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



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: P1760



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
 

Trouble Code: P0605



PCM Internal Error

Possible Causes:



Clear the code and retest for the same code. If the same code reset, the PCM will have to be replaced.
 

 
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