Sentra 1998

1.6L L4 VIN A Std 2

Print

Trouble Code: P0420



Catalyst Efficiency Below Normal (Bank 1)

Possible Causes:



Air leaks at the exhaust manifold or in the exhaust pipes
 
Catalytic converter is damaged, contaminated or has failed
 
Front HO2S or rear HO2S is contaminated with fuel or moisture
 
Front HO2S and/or the rear HO2S is loose in the mounting hole
 
Front HO2S older (aged) than the rear HO2S (HO2S is lazy)
 
TSB 01-068B (03/01) contains information related to this code
 

Trouble Code: P0420



Catalyst System Efficiency Below Threshhold (Includes Hybrid Models)

Possible Causes:



Three way catalyst (manifold)
 
Exhaust tube
 
Intake air leaks
 
Fuel injector
 
Fuel injector leaks
 
Spark plug
 
Improper ignition timing
 

Trouble Code: P0440



EVAP System Small Leak Detected

Possible Causes:



Fuel tank vacuum relief valve
 
Filler cap
 
Leak between EVAP canister purge valve and intake manifold
 
EVAP canister vent control valve
 
EVAP canister or fuel tank leaks
 
EVAP purge line
 
Hoses or tubes loose, disconnected, kinked or blocked
 
EVAP canister purge control valve or solenoid valve
 
Absolute pressure sensor
 
Fuel tank temperature sensor
 
MAP/BARO switch solenoid valve
 
EVAP canister vent valve O-ring damaged or missing
 
Water separator
 
EVAP canister saturated with water
 
EVAP control system pressure sensor
 
Refueling EVAP vapor cut valve
 
ORVR system leaks
 
 

Trouble Code: P0443



EVAP Canister Purge Control Solenoid Valve

Possible Causes:



Condition A: Check harness and connectors:
 
- circuit is open or shorted
 
Condition B: Check harness and connectors:
 
- circuit is open or shorted
 
EVAP canister purge control solenoid valve
 
MAF sensor
 
TP sensor
 
ECT sensor
 
EGR valve
 
Intake air leaks
 
Hoses
 
Canister control vacuum check switch
 
Condition C: Check harness and connectors:
 
- circuit is open or shorted
 
EVAP canister purge control solenoid valve
 
Hoses
 
Canister control vacuum check switch
 

Trouble Code: P0446



EVAP Vent Control Solenoid Circuit Malfunction

Possible Causes:



Vent solenoid circuit open, shorted to ground or to power (B+)
 
Vent control solenoid is damaged or has failed
 
PCM has failed
 
TSB 00-060 (7/00) contains information related to this code
 

Trouble Code: P0450



EVAP Control System Pressure Sensor

Possible Causes:



Harness or connectors
 
- Sensor circuit is open or shorted
 
Hose to sensor is loose or damaged
 
EVAP control system pressure sensor
 
EVAP canister purge volume control valve
 
EVAP canister vent control valve
 
EVAP canister
 
Hose to water separator loose or damaged
 

Trouble Code: P0455



EVAP Control System Gross Leak Detected (Includes Hybrid Models)

Possible Causes:



Fuel filler cap remains open or fails to close.
 
Incorrect fuel tank vacuum relief valve
 
Incorrect fuel filler cap used
 
Foreign matter caught in fuel filler cap
 
Leak is in line between intake manifold and EVAP canister purge volume control solenoid valve
 
Foreign matter caught in EVAP canister vent control valve.
 
EVAP canister or fuel tank leaks
 
EVAP purge line (pipe and rubber tube) leaks
 
EVAP purge line rubber tube bent.
 
Loose or disconnected rubber tube
 
EVAP canister vent control valve and the circuit
 
Drain filter
 
EVAP canister purge volume control solenoid valve and the circuit
 
Fuel tank temperature sensor
 
O-ring of EVAP canister vent control valve is missing or damaged.
 
EVAP control system pressure sensor
 
Refueling EVAP vapor cut valve
 
ORVR system leaks
 

Trouble Code: P0460



Fuel Level Sensor Circuit Noise (Includes Hybrid Models)

Possible Causes:



Harness or connectors
 
- CAN communication line is open or shorted
 
- Fuel level sensor circuit is open or shorted
 
Combination meter (unified meter and A/C amp.)
 
Fuel level sensor
 

Trouble Code: P0461



Fuel Level Sensor Circuit Range/Performance (Includes Hybrid Models)

Possible Causes:



Harness or connectors
 
- CAN communication line is open or shorted
 
- Fuel level sensor circuit is open or shorted
 
Combination meter (unified meter and A/C amp.)
 
Fuel level sensor
 

Trouble Code: P0464



Fuel Level Sensor Circuit Malfunction

Possible Causes:



Fuel level sensor signal circuit is open or shorted to ground
 
Fuel level sensor signal circuit shorted to VREF or power (B+)
 
Fuel level sensor is damaged or has failed
 
PCM is damaged
 

Trouble Code: P0500



Vehicle Speed Sensor Circuit

Possible Causes:



Harness or connector
 



ABS/TCS control unit is damaged or has failed
 
Combination meter is damaged or has failed
 
VSS signal circuit is open, shorted to ground or shorted to B+
 
VSS is damaged or has failed
 
PCM has failed
 

Trouble Code: P0505



Idle Air Control, Auxiliary Air Control Valve Circuit Malfunction

Possible Causes:



IACV-AAC valve control circuit is open or shorted to ground
 
IACV-AAC valve control circuit is shorted to system power (B+)
 
IACV-AAC valve is damaged or has failed
 
PCM is damaged or has failed
 

Trouble Code: P0510



Throttle Position Switch Closed

Possible Causes:



Harness or connectors:
 
- check circuit for open or short
 
Throttle position switch
 
Throttle position sensor
 

Trouble Code: P0605



PCM or ECM Internal Fault Detected

Possible Causes:



Clear the codes and retest for DTC P0605. If the same code resets, substitute a known good PCM and retest. If the code does not reset, the original PCM or ECM has failed.
 

Trouble Code: P1105



MAP/BARO Switch Solenoid Valve

Possible Causes:



Harness or connectors:
 
- check circuit for open or short or connectors loose or damaged
 
Hoses
 
Absolute pressure sensor
 
MAP/BARO switch solenoid valve
 

Trouble Code: P1126



Thermostat Malfunction (Stuck Open)

Possible Causes:



Inspect for low coolant level
 
Inspect for incorrect coolant mixture
 
Check the operation of the thermostat (it may be stuck open)
 

Trouble Code: P1148



Closed Loop Control Function (Includes Hybrid Models)

Possible Causes:



Harness or connectors
 
- Air fuel ratio (A/F) sensor (sensor 1 on V6 and V8) circuit is open or shorted.
 
Air fuel ratio (A/F) sensor (sensor 1 on V6 and V8)
 
Air fuel ratio (A/F) sensor (sensor 1 on V6 and V8) heater
 

Trouble Code: P1168



Closed Loop Control Function (Bank 2)

Possible Causes:



Harness or connectors
 
- Air fuel ratio (A/F) sensor 1 or 2 circuit is open or shorted.
 
Air fuel ratio (A/F) sensor 1 or 2
 
Air fuel ratio (A/F) sensor 1 or 2 heater
 

Trouble Code: P1220



Fuel Pump Control Module (FPCM)

Possible Causes:



Harness or connectors
 
- FPCM circuit is shorted
 
Dropping resistor
 
FPCM
 

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, missing or the sensor has failed
 
CMP sensor signal is erratic, missing or the sensor has failed
 
TSB 01-052 (9/01) contains information related to this code
 

Trouble Code: P1320



Ignition Signal

Possible Causes:



Check harness and connectors:
 
- circuit is open or shorted
 
Power transistor unit
 
CMP sensor or circuit
 

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 (CKP) Sensor

Possible Causes:



Check harness and connectors:
 
- circuit is open or shorted
 
CKP sensor
 
Drive plate
 

Trouble Code: P1400



EGR Control Solenoid Circuit Malfunction

Possible Causes:



Harness and connectors:
 

- EGRC solenoid control circuit is shorted to system power



EGRC solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P1401



EGR Temperature Sensor

Possible Causes:



Check harness and connectors:
 
- circuit is open or shorted
 
EGR temperature sensor
 
EGR function
 
EGR control solenoid valve
 

Trouble Code: P1402



EGR Function (Open)

Possible Causes:



Harness or connectors
 
- The EGR volume control valve circuit is open or shorted.
 
EGR volume control valve leaking or stuck open
 
EGR temperature sensor
 

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: P1444



EVAP Canister Purge Volume Control Solenoid Valve

Possible Causes:



- EVAP control system pressure sensor
 
- EVAP canister purge volume control solenoid valve; valve is stuck open
 
- EVAP canister vent control valve
 
- EVAP canister
 
- Hoses are connected incorrectly or clogged
 

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
 
EVAP control system pressure sensor and circuit
 
Blocked rubber tube to EVAP canister vent control valve
 
Water separator
 
EVAP canister is saturated with water.
 
Vacuum cut valve
 

Trouble Code: P1490



Vacuum Cut Valve Bypass Valve

Possible Causes:



Harness or connectors
 
- The vacuum cut valve bypass valve circuit is open or shorted
 
Vacuum cut valve bypass valve
 

Trouble Code: P1491



Vacuum Cut Valve Bypass Valve

Possible Causes:



Vacuum cut valve bypass valve
 
Vacuum cut valve
 
Bypass hoses for clogging
 
EVAP control system pressure sensor and circuit
 
EVAP canister vent control valve
 
Hose between fuel tank and vacuum cut valve clogged
 
Hose between vacuum cut valve and EVAP canister clogged
 
EVAP canister
 
EVAP purge port of fuel tank for clogging
 

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
 

 
label.common.footer.alt.autozoneLogo