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Emissions Component

What is the Drive Cycle for a Porsche Boxter?

I couldn't smog test my Porsche 986 because the emission monitors have not reset since I installed a new battery installed. What is drive cycle I should follow to reset the monitors on a 1997 Porsche Boxter?


Below we outline the drive cycle you'll need to perform in order to get your Porsche Boxter 986 to complete it's readiness monitors, also known as emission monitors. Perform the entire drive cycle. Completing only one portion of the drive cycle will not make the particular monitor which you're trying to make ready, complete. The entire drive cycle must be performed every time you attempt the set any of the monitors. Please note: Take extra caution when perform the Porsche Boxter drive cycle on public roadways. if you think you will be unable to safely perform the drive cycle please seek assistance from an experienced Porsche mechanic or smog check repair center.

Porsche Boxter Drive Cycle - How to Complete the OBD II Emission Monitors  

Prior to starting the driving cycle ensure your Boxter has only between 1/4 and 3/4 of fuel in the gas tank. Also do not exceed 3,000 rpm or 60 mph during any portion of the drive cycle.

A. Start your Porsche Boxter and let it idle for approximately 2 1/2 minutes. This will allow the ECU to diagnose oxygen sensor aging; meaning the computer will be monitoring the oxygen sensor warm-up period and reaction to rising exhaust temperatures. During this period the ECU is also testing the Secondary Air Injection system. 

B. Begin driving. Accelerate to 20-30 MPH and maintain your speed for 3 1/2 minutes. The ECU will be testing catalytic converter efficiency. 

C. Next, accelerate to 40-60 MPH. Once again maintain steady speed, this time for approximately 15 minutes. The EVAP system is now being tested along with adaptation range (2) and the oxygen sensor (switching). 

D. Decelerate and come to a complete stop. If equipped with a manual transmission, idle in neutral for 3 minutes. If equipped with an automatic Tiptronic transmission, idle in drive (D) for 3 minutes. Adaptation range (2) is now being tested.

E. Repeat steps B through D. Drive cycle complete.

posted by SmogTips Support 09-27-2017 04:34 PM

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