When starting to diagnose Nissan engine light codes, start by having a 10-mega ohm impedance capacity digital voltmeter to ensure proper measurements of sensitive engine electronic parts. But before proceeding with retrieving the codes, a visual engine inspection should be performed to check suspected wires related to the vehicle symptoms for chaffing, pinching, stretching or poor insulation. Also check for engine vacuum leaks visually on vacuum hoses and gaskets. Once these basic inspections are completed, we can proceed to retrieve the codes.

As in any vehicle made after 1996, Nissan check engine light codes can be easily retrieve by using an OBD2 scanner. You can connect this under your engine dash on top of your brake pedal. Once you got it, jot it down and get the code number. If you combine this Nissan check engine code with the vehicle symptoms, you can narrow down the possible culprit sensor or components causing the problem. Example, poor acceleration is related to tps sensor but no start symptom is not related to tps sensor…it more a related to crank sensor which can cause no spark (there must be a relation between the symptom and the affected sensor).

Once you have the engine fault code number and symptoms combined, here are some repair strategies to use:

If you have more than one code, fix the first code first
Once a code is being repaired, reset the code to confirm the fix.
If you have multiple codes followed by “no communication code”, most likely its a wiring or a computer problem

Fixing Nissan engine light codes require having a list of code description so you can understand the sensor circuit and analyze the problem. Sometimes, this list is built-in inside the scanner but you can also get it using a Nissan repair manual. From this description, you will see a “diagnostic tree” diagram on how to systematically check the components circuits and parts. Remember to use the wiring diagram when probing the wires and suspected sensors.

TIP:

ATS uses 2 methods that quickly give you the fix instead of using long hours of testing.

This entry was posted on Monday, May 5th, 2008 at 4:43 am and is filed under Check Engine Light FIXES. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.