Nissan OBD / OBD2 Codes >> Nissan Altima Sentra Stanza 240SX

General Information

  • Engine control module (ECM) incorporates self-diagnosis function
  • Malfunction indicator lamp (MIL) will illuminate if certain faults are recorded
  • ECM operates in backup mode if sensors fail, to enable vehicle to be driven to workshop
  • Trouble codes can be displayed by the red LED (see Image # 3; callout 1) in the engine control module (ECM) and the MIL lamp in diagnostic mode 2, or using a suitable code reader

Accessing Trouble Codes

Self-Diagnosis – Mode 1
  • Access engine control module (ECM):
    • Except 240SX – center fascia – 1
    • 240SX – RH kick panel – 2
  • Switch ignition ON
  • Check MIL and red LED in ECM  illuminate
  • Start engine.  Allow to idle
  • If MIL and LED extinguish, no trouble codes have been recorded
  • If MIL and LED remain illuminated, access trouble codes
Self-Diagnosis – Mode 2
  • Switch ignition ON. Do NOT start engine.
  • Turn diagnostic mode selector on ECM fully clockwise  (see Image # 3; callout 2
  • Wait at least 2 seconds
  • Turn diagnostic mode selector on ECM fully counterclockwise  (see Image # 3; callout 2)
  • Self-diagnosis now in Mode 2
  • MIL and red LED in ECM should flash
  • Count flashes and compare with trouble code table below.
    • Long flashes indicate the ‘tens’ of the trouble code
    • Short flashes indicate the ‘units’ of the trouble code
    • A short pause separates each flash
    • A long pause separates each trouble code
  • Switch ignition OFF
  • Self-diagnosis will return to Mode 1

Clearing Trouble Codes

  • Switch ignition ON. Do NOT start engine
  • Turn diagnostic mode selector on ECM fully clockwise
  • Wait at least 2 seconds
  • Turn diagnostic mode selector on ECM fully counterclockwise
  • Self-diagnosis now in Mode 2
  • Turn diagnostic mode selector on ECM fully clockwise
  • Wait at least 2 seconds
  • Turn diagnostic mode selector on ECM fully counterclockwise
  • Self-diagnosis will return to Mode 1
  • Trouble codes now erased
  • Switch ignition OFF

 Trouble Codes

 
93-94 Altima 2.4L Engine Code: KA24DE
91-94 Sentra/NX 1.6L Engine Code: GA16DE
91-94 Sentra/NX 2.0L Engine Code: SR20DE
90-92 Stanza 2.4L Engine Code: KA24E
91-94 240SX 2.4L Engine Code: KA24DE
Trouble codeFault locationProbable cause
11Crankshaft position (CKP) sensor circuit malfunctionWiring, CKP sensor, ECM
12Mass air flow (MAF) sensor -range/ performance problemWiring, MAF sensor, ECM
13Engine coolant temperature (ECT) sensor range/performance problemWiring, ECT sensor, ECM
14Vehicle speed sensor (VSS) -malfunctionWiring, VSS, ECM
21Ignition coil -no primary signalWiring, ignition coil!module, ignition system, ECM
31Engine control module (ECM) -malfunctionECM
32Exhaust gas recirculation (EGR) system -control valve malfunctionWiring, hose leak/blockage, EGR cut OFF solenoid, ECM
33Heated oxygen sensor (H02S) -circuit malfunctionWiring, H02S, intake/fuel system, injector, ECM
34Knock sensor (KS) -circuit malfunctionWiring, KS, ECM
35Exhaust gas recirculation temperature (EGRT) sensor-circuit malfunctionWiring, EGRT sensor, ECM
41lntake air temperature (lAT) sensor circuit malfunctionWiring, IAT sensor, ECM
43Throttle position (TP) sensor -circuit malfunctionWiring, TP sensor, ECM
45Injector leak -malfunctionlnjector, fuel system, ECM
54ECM/TCM -communication malfunctionWiring, ECM, TCM
55No faults detected