Odb ii

[doridori]

Hi Maytag,

Thanks a lot for your wonderful info about the drive cycle. Let me find a road that I can do it.

Some questions:

1. When I start the Boxster, does it need to be cold start? If so, how cold does it need to be?

2. When I run a ODB II test, the exact error is "p0327: Knock sensor 1 circuit low input (bank 1)". Do you think I need to replace the knock sensor also?

Thanks

Originally Posted by maytag

Here's the drive-cycle that should kick you into "ready" mode:
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.