Nissan OBD check engine light fault codes

Have you ever had the red ‘check engine’ light illuminate on your dash?  You wouldn’t be the first one.  This is a little worrying when you’re on the freeway and have no place to stop.  Then there is the stress of imagining what the mechanics bills would be like.

Here is a simple guide to finding out what’s caused the ‘check engine’ light to come on, so you know what’s going on before you see your mechanic.  You may be able to identify and fix the problem yourself.

This is the procedure for checking the ‘check engine’ light fault codes for Nissans 1990-2000 that have the Nissan OBD (consult) system installed.  For a complete list of compatible cables go to http://www.blazt.biz/information/cars.php.

Step 1:

Locate the ECU. In most models it’s underneath the kickboard in front of the front passenger seat.  There is a knob or switch on the side marked diagnostics that has an LED next to it.

Turn this knob clockwise (or to the ‘on’ position).

Step 2:

Note the amount of flashes shown by the LED.  This is the ‘check engine’ light fault code.  There may be several codes, but they are easily interpreted.  There will be a sequence of flashes, the long flashes (0.6sec each) represent the 10’s column, and the short flashes (0.3sec each) represent the 1’s.  For example if you got 2 long flashes followed by one short flash then you would have a code of 21 (ignition fault).  If you have more than one fault then the next fault code in sequence will show.

Step 3:

Turn the diagnostics knob anticlockwise or ‘off’ and note the fault code table below.

Nissan check engine light fault codes

11 Crank Angle Sensor/Camshaft Position Sensor. 12 Air Flow Meter/Mass Air Flow Sensor. 13 Engine Coolant Temperature Sensor. 14 Vehicle Speed Sensor. 21 Ignition Signal. 22 Fuel Pump. 23 Idle Switch. 24 Throttle Valve Switch. 25 Idle Speed Control Valve. 28 Cooling Fan Circuit. 31 ECM. 32 EGR Function. 33 Heated Oxygen Sensor. 34 Knock Sensor. 35 Exhaust Gas Temperature Sensor. 36 EGR Control-Back Pressure Transducer. 37 Knock Sensor. 38 Right hand bank Closed Loop (B2). 41 Intake Air Temperature Sensor. 42 Fuel Temperature Sensor. 43 Throttle Position Sensor. 44 ECCS Normal Operation. 45 Injector Leak. 47 Crankshaft Position Sensor. 51 Injector Circuit. 53 Oxygen Sensor. 54 A/T Control. 55 No Malfunction. 63 No. 6 Cylinder Misfire. 64 No. 5 Cylinder Misfire. 65 No. 4 Cylinder Misfire. 66 No. 3 Cylinder Misfire. 67 No. 2 Cylinder Misfire. 68 No. 1 Cylinder Misfire. 71 Random Misfire. 72 TWC Function right hand bank. 73 TWC Function right hand bank. 76 Fuel Injection System Function right hand bank. 77 Rear Heated Oxygen Sensor Circuit. 82 Crankshaft Position Sensor. 84 A/T Diagnosis Communication Line. 85 VTC Solenoid Valve Circuit. 86 Fuel Injection System Function right hand bank. 87 Canister Control Solenoid Valve Circuit. 91 Front Heated Oxygen Sensor Heater Circuit right hand bank. 94 TCC Solenoid Valve. 95 Crankshaft Position Sensor. 98 Engine Coolant Temperature Sensor. 101 Front Heated Oxygen Sensor Heater Circuit right hand bank. 103 Park/Neutral Position Switch Circuit. 105 EGR and EGR Canister Control Solenoid Valve Circuit. 108 Canister Purge Control Valve Circuit

To make things easy blaZt have a cable and software package that does all this for you and takes the worry out of the ‘check engine’ light.  Simply plug the cable into your standard diagnostics port, the other end into your computer and press connect.  One click on ‘download fault codes’ will tell you what the problem is.  Products are in stock and cost less than one trip to the mechanic.  Priced from $65.  You can’t afford to be without one, it will pay for itself in the first use.  Go to www.blazt.biz for more info.

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