Sentra 1997

2.0L L4 VIN - Auto 1

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2.0L L4 VIN - Auto

Trouble Code: P0100



Mass Air Flow Sensor

Possible Causes:



A) & C) above:
 
Harness or connectors
 
- sensor circuit is open or shorted
 
Mass air flow sensor
 
 
B), D) & E) above:
 
Harness or connectors
 
- sensor circuit is open or shorted
 
Intake air leaks
 
Mass air flow sensor
 

Trouble Code: P0110



Intake Air Temperature Sensor

Possible Causes:



Check harness and connectors:
 
- circuit is open or shorted
 
IAT sensor
 

Trouble Code: P0115



Engine Coolant Temperature Sensor Circuit Malfunction

Possible Causes:



ECT sensor signal circuit open or shorted to ground
 
ECT sensor signal circuit shorted to VREF or to system power
 
ECT sensor is damaged or has failed (out of calibration)
 
ECM/PCM has failed
 

Trouble Code: P0120



Throttle Position Sensor

Possible Causes:



Condition A:
 
Harness or connectors
 
- Sensor circuit is open or shorted
 
Throttle position sensor
 
 
Condition B:
 
Harness or connectors
 
- Sensor circuit is open or shorted
 
Throttle position sensor
 
Fuel injector
 
CMP sensor
 
MAF sensor
 
 
Condition C:
 
Harness or connectors
 
- Sensor circuit is open or shorted
 
Intake air leaks
 
Throttle position sensor
 

Trouble Code: P0125



Insufficient Engine Coolant Temperature for Closed Loop Fuel Control (Includes Hybrid Models)

Possible Causes:



Harness or connectors
 
- High resistance in the circuit
 
Engine coolant temperature sensor
 
Thermostat
 

Trouble Code: P0130



Front Heated Oxygen Sensor (Right Bank)

Possible Causes:



Check harness and connectors:
 
- circuit is open or shorted
 
Front HO2S (right bank)
 
Fuel pressure
 
Injectors
 
Intake air leaks
 

Trouble Code: P0131



Front Heated Oxygen Sensor

Possible Causes:



Front HO2S
 
Front HO2S heater
 
Fuel pressure
 
Injectors
 
Intake air leaks
 

Trouble Code: P0132



Front Heated Oxygen Sensor

Possible Causes:



Front HO2S
 
Front HO2S heater
 
Fuel pressure
 
Injectors
 

Trouble Code: P0133



Air Fuel Ratio (A/F) Sensor 1 Circuit Slow Response (Includes Hybrid Models)

Possible Causes:



Harness or connectors
 
- Air fuel ratio (A/F) sensor circuit is open or shorted.
 
Air fuel ratio (A/F) sensor 1
 
Air fuel ratio (A/F) sensor heater 1
 
Fuel pressure
 
Fuel injector
 
Intake air leaks
 
Exhaust gas leaks
 
PCV valve
 
Mass air flow sensor
 

Trouble Code: P0134



Front Heated Oxygen Sensor - High Voltage

Possible Causes:



Harness or connectors
 
- Sensor circuit is open or shorted
 
Front HO2S
 

Trouble Code: P0135



Front Heated Oxygen Sensor Heater

Possible Causes:



Check harness and connectors:
 
- circuit is open or shorted
 
Front HO2S heater
 

Trouble Code: P0137



Heated Oxygen Sensor 2 Circuit Low Voltage (Includes Hybrid Models)

Possible Causes:



Harness or connectors
 
- Heated oxygen sensor 2 circuit open or shorted.
 
Heated oxygen sensor 2
 
Fuel pressure
 
Fuel injector
 
Intake air leaks
 

Trouble Code: P0139



Heated Oxygen Sensor 2 Circuit Slow Response (Includes Hybrid Models)

Possible Causes:



Harness or connectors
 
- Heated oxygen sensor circuit is open or shorted.
 
Heated oxygen sensor 2
 
Fuel pressure
 
Fuel injector
 
Intake air leaks
 

Trouble Code: P0140



Rear Heated Oxygen Sensor - High Voltage

Possible Causes:



Harness or connectors
 
- Sensor circuit is open or shorted
 
Rear HO2S
 

Trouble Code: P0141



Rear Heated Oxygen Sensor Heater (Right Bank)

Possible Causes:



Check harness and connectors:
 
- circuit is open or shorted
 
Rear HO2S heater
 

Trouble Code: P0171



Fuel Injection System Too Lean (Includes Hybrid Models)

Possible Causes:



Intake air leaks
 
Air fuel ratio (A/F) sensor 1 (front heated oxygen sensor)
 
Fuel injector
 
Exhaust gas leaks
 
Incorrect fuel pressure
 
Lack of fuel
 
Mass air flow sensor
 
Incorrect PCV hose connection
 

Trouble Code: P0172



Fuel Injection System Too Rich (Includes Hybrid Models)

Possible Causes:



Air fuel ratio (A/F) sensor 1 (front heated oxygen sensor)
 
Fuel injector
 
Exhaust gas leaks
 
Incorrect fuel pressure
 
Mass air flow sensor
 

Trouble Code: P0180



Fuel Temperature Sensor

Possible Causes:



Check harness and connectors:
 
- circuit is open or shorted
 
Fuel temperature sensor
 

Trouble Code: P0300



Multiple Cylinder Misfire Detected (Includes Hybrid Models)

Possible Causes:



Improper spark plug
 
Insufficient compression
 
Incorrect fuel pressure
 
Fuel injector circuit is open or shorted
 
Fuel injector
 
Intake air leak
 
The ignition signal circuit is open or shorted
 
Lack of fuel
 
Drive plate or flywheel
 
Air fuel ratio (A/F) sensor 1
 
Incorrect PCV hose connection
 

Trouble Code: P0301



No.1 Cylinder Misfire Detected (Includes Hybrid Models)

Possible Causes:



Improper spark plug
 
Insufficient compression
 
Incorrect fuel pressure
 
Fuel injector circuit is open or shorted
 
Fuel injector
 
Intake air leak
 
The ignition signal circuit is open or shorted
 
Lack of fuel
 
Drive plate or flywheel
 
Air fuel ratio (A/F) sensor 1
 
Incorrect PCV hose connection
 

Trouble Code: P0302



No. 2 Cylinder Misfire Detected (Includes Hybrid Models)

Possible Causes:



Improper spark plug
 
Insufficient compression
 
Incorrect fuel pressure
 
Fuel injector circuit is open or shorted
 
Fuel injector
 
Intake air leak
 
The ignition signal circuit is open or shorted
 
Lack of fuel
 
Drive plate or flywheel
 
Air fuel ratio (A/F) sensor 1
 
Incorrect PCV hose connection
 

Trouble Code: P0303



No. 3 Cylinder Misfire Detected (Includes Hybrid Models)

Possible Causes:



Improper spark plug
 
Insufficient compression
 
Incorrect fuel pressure
 
Fuel injector circuit is open or shorted
 
Fuel injector
 
Intake air leak
 
The ignition signal circuit is open or shorted
 
Lack of fuel
 
Drive plate or flywheel
 
Air fuel ratio (A/F) sensor 1
 
Incorrect PCV hose connection
 

Trouble Code: P0304



No. 4 Cylinder Misfire Detected (Includes Hybrid Models)

Possible Causes:



Improper spark plug
 
Insufficient compression
 
Incorrect fuel pressure
 
Fuel injector circuit is open or shorted
 
Fuel injector
 
Intake air leak
 
The ignition signal circuit is open or shorted
 
Lack of fuel
 
Drive plate or flywheel
 
Air fuel ratio (A/F) sensor 1
 
Incorrect PCV hose connection
 

Trouble Code: P0325



Knock Sensor Circuit Malfunction (Bank 1)

Possible Causes:



Knock sensor signal circuit is open or shorted to ground
 
Knock sensor signal circuit is shorted to VREF or system power
 
Knock sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0325



Knock Sensor (KS) Circuit

Possible Causes:



Check harness and connectors:
 
- circuit is open or shorted
 
Knock sensor
 

Trouble Code: P0335



Crankshaft Position Sensor (POS) Circuit (Includes Hybrid Models)

Possible Causes:



Harness or connectors
 
- CKP sensor (POS) circuit is open or shorted.
 
- CMP sensor (PHASE) (bank 2) circuit is shorted.
 
- EVT control position sensor (bank 2) circuit is shorted.
 
- Battery current sensor circuit is shorted.
 
- APP sensor 2 circuit is shorted.
 
- Crankshaft position sensor (POS) circuit is open or shorted.
 
- Accelerator pedal position sensor circuit is shorted.
 
- Refrigerant pressure sensor circuit is shorted.
 
- EVAP control system pressure sensor circuit is sorted.
 
- Tumble control valve position sensor circuit is shorted.
 
Crankshaft position sensor (POS)
 
Accelerator pedal position sensor
 
Camshaft position sensor (PHASE) (bank 2)
 
Exhaust valve timing control position sensor (bank 2)
 
Battery current sensor
 
Refrigerant pressure sensor
 
EVAP control system pressure sensor
 
Tumble control valve position sensor
 
Signal plate
 
Battery current sensor
 

Trouble Code: P0340



Camshaft Position Sensor Circuit (Includes Hybrid Models)

Possible Causes:



Harness or connectors
 
- CMP sensor (PHASE) (bank 1) circuit is open or shorted.
 
Camshaft position sensor (PHASE) (bank 1)
 
Camshaft (INT)
 
Starter motor
 
Starting system circuit
 
Dead (Weak) battery
 

Trouble Code: P0400



EGR System Function - No Flow

Possible Causes:



EGR valve (stuck closed)
 
EGRC-BPT valve
 
Vacuum hose
 
EGRC solenoid valve
 
EGR passage
 
EGR temperature sensor
 
Exhaust gas leaks
 

Trouble Code: P0402



EGRC-BPT Valve Malfunction

Possible Causes:



EGRC-BPT valve
 
EGR valve
 
Loose, disconnected or blocked tube
 
CMP sensor
 
Blocked exhaust system
 
Blocked EGR orifice
 
MAF sensor
 
EGRC solenoid valve
 

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: 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
 

 
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