Matching You with a Pre-Screened Smog Check Center You will Love
Free Online Smog Check Diagnosis
$500 Free Consumer Repair Assistance
Failed Emissions Test
How to Pass the Test
Who Else Wants To Pass the Smog Check
Miles: 
Which Type Should I Choose?
 
   
    Forum > Failed Smog Test > Question

Join the community and post your questions. Ask-A-Tech right now!
 
 



Failed Smog Test
 

How Make Emission Monitors Ready on 2012 Nissan Altima?

I was out of country and my car was parked and not driven for almost 10 months, when I returned in July 2018, saw car battery was down and also registration was expired in May 2018 and a smog test was required. To start my car I called AAA and got my battery replaced and then drove for around 100 miles and went for smog test. But it failed for Catalyst and O2 monitor not ready. I then further drove my car in city condition and on highway for 300 miles and went for smog test. Now, O2 is passed but the Catalyst is still failing. I called up Nissan Service station and they said, they too cannot help with it but I just need to drive my car more as post battery replacement the monitor gets reset. Can you kindly suggest what is the driving cycle for 2012 Nissan and how many miles I need to drive further in 15, 25, 35 & 55 miles ?

Answer:  

Having replaced your Nissan Altima's battery caused the OBDII monitors to clear themselves, requiring a drive cycle be completed in order to make the monitors READY or COMPLETE again. Follow the Nissan Altima drive cycle below. The required monitors should become ready to pass the smog inspection simply by driving your Altima for 200-300 miles and over the course of a few days. We notice you mention having already driven about 400 miles. We'd like to note, due to individual driving habits/patterns, sometimes the drive cycle parameters are not met with ordinary driving, and following the Nissan Altima drive cycle is necessary.

Take extra caution when performing drive cycles on public roadways, obeying all traffic laws. You may also seek repair assistance from a Nissan dealership. They will be able to complete the drive cycle using manufacture specific scan tools. If after performing the drive cycle twice, your Altima is still unable to pass the smog check because its monitors (or monitor) is incomplete, please seek assistance from a smog check repair center or Nissan dealership.

Nissan Altima Drive Cycle for OBDII Monitors

Pre-Conditioning Requirements:

Ensure the MIL (malfunction indicator lamp) is not on.

Ensure gas tank fuel level is between 15% and 85% at all times.

Drive cycle must start while engine is cold. Best performed in the morning and after being parked overnight. The actual requirement is that the engine be between 68 and 86 degrees F prior to the start of the drive cycle.

Drive Trace:

A. Start your Nissan Altima and idle engine until coolant temperature reaches 160F (until normal operating temperature is reached).

B. Using a timer, idle the engine for an additional 1 1/2 minutes.

C. Begin driving. Accelerate smoothly to 56 mph with the transmission in (D) and overdrive ON, then release gas pedal and coast for 10 seconds.

D. Accelerate to 56 mph and maintain speed for at least 10 minutes. Use smooth and quick acceleration and maintain speed as constant as possible.

E. Stop and idle your Nissan Altima for 10 seconds.

F. Accelerate to 25 mph in 10 seconds and hold gas pedal steady for 20 seconds. Use smooth and quick acceleration and maintain speed as constant as possible.

G. Repeat steps E and F eight (8) times. Decelerate (coast down) to 15 mph and then drive for 13 minutes at speeds between 15mph and 35mph.

H. Accelerate to 53-56 mph and maintain speed for at least 6 minutes. In this step it is more important to maintain accelerator pedal position than speed. Therefore you are allowed 3 mph fluctuation in speed, but must try and keep the gas pedal steady.

- End of Drive Cycle -

If all emissions systems are functioning properly, completing the drive cycle above will set the emission monitors (also known as readiness flags) required to pass the smog check. We recommend performing the drive cycle at least twice before visiting a smog check station.


posted by SmogTips Support 08-22-2018 05:09 PM
 


Related Nissan Altima questions and answers you might find useful:

How Make Emission Monitors Ready on 2012 Nissan Altima? by Atanu on 08-21-2018 02:28 PM

2011 Nissan Altima Need Specific Drive Cycle Information by Lance on 12-11-2017 02:49 PM

What Are The Reasons My Nissan Altima Has High NOx? by Albert on 10-13-2017 03:48 PM

Nissan Altima Service Engine Soon Light Water Pump Problem by arthur on 02-22-2017 08:46 AM

Smog Test for Nissan Altima Recently in Accident by lizzy on 12-03-2016 02:20 PM