SMOG Check sensors not ready | FerrariChat

SMOG Check sensors not ready

Discussion in 'California(Portofino)/Roma(Amalfi)' started by PortoV8, Mar 12, 2025.

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  1. PortoV8

    PortoV8 Rookie

    Jan 10, 2025
    26
    Anyone has experience in how to complete drive cycles for Smog check in CA? My Portofino passed emission test, but failed sensor checks.

    The shop told me to drive the car more and go back to check the sensors again. Looked it up on YouTube and seems like there are specific steps to complete driving cycle such as specific speed, drive duration and idle time…thanks in advance.
     
    rob5819 likes this.
  2. sfcarguy

    sfcarguy Formula Junior
    Rossa Subscribed

    Mar 9, 2018
    527
    Earth
    Ferrari OBDII Drive cycle process:

    The OBD-II drive cycle begins with a cold start (coolant temperature below 122 F, and the coolant and air temperature sensors within 11 degrees of one another). This condition is easily achieved by letting the car sit overnight.

    The ignition must not be left on prior to the cold start. Otherwise the heated oxygen sensor diagnostic may not run.

    Start the engine and idle the engine in drive for two and half minutes, with the A/C and rear defroster on if equipped.

    Turn the A/C and rear defroster off, and accelerate to 55 mph under moderate, constant acceleration. Hold at a steady speed for three minutes.

    Decelerate (coast down) to 20 mph without braking or depressing the clutch for manual transmissions. Accelerate back to 55-60 mph at 3/4 throttle. Hold at a steady speed for five minutes.

    Decelerate (coast down) to a stop without braking.

    Note: Fuel level must be above 1/2 of a tank in order for EVAP diagnostic to run.

    Note: If O2S monitor does not set, try an Italian tune up.
     
    PortoV8 and rob5819 like this.
  3. rob5819

    rob5819 Formula Junior

    Dec 12, 2017
    941
    San Diego
    Full Name:
    Rob Barry
    I live in San Diego and four of my cars are over eight years old and require emissions every two years. I use https://www.amazon.com/dp/B00652G4TS?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1 to do an emissions check before taking them in. I've had a great success with two BMWs, one Maserati, and my 458 Spider doing a 45 minute boring, slow drive with more than 1/2 a tank of gas, but less than 3/4. I turn the car on with all A/C turned on maximum and let it idle for five minutes, often opening / closing the roof to put more load on the system. Then a boring drive keeping the RPMs below 3000 and the speed below 50 mph. I've read through hundreds of drive cycles, but this one has worked reliably for me to get all the sensors to set.

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    PortoV8 and Willl like this.
  4. PortoV8

    PortoV8 Rookie

    Jan 10, 2025
    26
    I just received the scanner today from Amazon, will report back if the procedure works or not. Thanks!
     

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