After about five seconds it will start to output out the diagnostic codes as with the 4 cylinder ecu. A particular trouble code can be identified by the number of four digit numeral flashes.

Nissan Check Engine Light Guide Big Nissan

This makes it easy to diagnose the issue that caused the light to illuminate.

Nissan check engine light codes. How to reset nissan check engine light. Reinstall the mass air flow sensor and clear the check engine light using fixd. Reconnect any disconnected vacuum lines and replace any damaged vacuum lines that are leaking then use fixd to clear check engine light code p0171.

One red flash and two green flashes means code 12. Follow the instructions below to read and reset nissan check engine light codes yourself with an obd2 scanner. No matter why the check engine light is on it s best to come to an authorized nissan service center to get it checked out.

Our service technicians have the most up to date diagnostic equipment that can quickly read nissan obd ii trouble codes. If check engine light code p0171 is triggered again check the rest of the vacuum lines for leaks and continue to the rest of the diagnostic process. Note each code as it is displayed the red led flashing once for 10 s and the green led flashing once for 1 s.

Turn on the ignition but do not start the engine. Allow your obd2 scanner to turn on. P1491 vacuum cut valve bypass valve.

P1490 vacuum cut valve bypass valve circuit read our article on automotive circuit testing for help with this nissan check engine light code. Once the ecm is in diagnostic test mode ii the service engine soon warning light will start flashing. Locate the diagnostic port under the dashboard and plug in your obd2 scanner.

Press enter to read codes. Once you read the codes you will need to fix the problems related to the fault codes. The technicians have a nissan specific code reader that can talk with the car s computer.

The first step to read the codes is setting the ecm in diagnostic test mode ii. Get the code read. Count to flashes to determine the code.

No matter the situation when the check engine light comes on in your nissan we always suggest stopping by our service center so one of our knowledgeable technicians can properly diagnose and repair your vehicle. Remove the mass air flow sensor and clean the sensor using mass air flow cleaner or contact cleaner. P1492 evap canister purge control solenoid valve circuit read our article on automotive circuit testing for help with this nissan check engine light code.