Step by step guide on how to retrieve troubles codes from Nissan vehicles 1995
and earlier, including code chart.
Begin with the vehicle on level ground, engine off with the emergency brake set.
- To boot the computer in mode four make sure
the key is in the "OFF" position. Next locate the mode switch on the computer which
is either a small toggle or a screw style switch. The screw style switch is activated
by turning the screw one way then back the other way.
- Turn the key to the "ON" position
without starting the engine, next flip the switch or turn the screw. The led light
will blink one time for mode one, then two times for mode two, three times for mode
- When the lights blink four times this
is the mode needed to display the trouble codes, flip the switch or turn the screw
back. The led light will now blink out the trouble code or codes, the computer must be
in mode four to retrieve the trouble codes.
- The first led light will blink the first
digit of the code number, there will be a pause then the remaining led light will
blink out the second digit of the trouble code. For example, if the first led light
blinks one time, and the second led light blinked two times the code number would
be 12. Some Nissan models are equipped with just one led light in this case the
light will blink the first part of the code pause, then continue with the second
number of the code. Once repairs have been made the computer codes can be cleared
by disconnecting the negative battery terminal for three minutes and then reconnect it.
A diagnostic code is helpful when troubleshooting a particular problem that has
occurred. After the trouble code is defined the problem can be repaired and rechecked.
Early Nissan check engine lights are not used to blink out a trouble code like on
most vehicles but instead use a mode and retrieval method. Most computers are located
behind the glove box, under the passengers seat or in the center console depending
on year and model and is set up to work in five different modes, the first three
modes of operation are used for the manufacturing and assembly process, mode four
is used for trouble code output sequence and mode five is used to read oxygen sensor
Nissan Trouble Codes
Code 11 Crank angle sensor
Code 12 Mass airflow sensor
Code 13 Engine coolant temperature sensor
Code 14 Vehicle speed sensor
Code 21 No ignition reference
Code 22 Fuel pump
Code 31 Engine control unit
Code 32 EGR sensor
Code 33 Oxygen sensor
Code 34 Knock sensor
Code 35 EGR temperature sensor
Code 43 Throttle position sensor
Code 45 Injector leak
Code 51 Injector circuit
Code 54 Automatic transmission signal
Code 55 No malfunction recorded
Article first published 2017-01-27