PSA: emissions testing fail!
07-06-2017, 07:57 PM
#1
Racer
Thread Starter
PSA: emissions testing fail!
I have a Cobb access port, and love the tune for my 991.1. In Connecticut the car needs the mission testing every two years. Essentially they plug something into the OBD 2 port and determine if all the emissions components are functional. $20 for the trouble.
I contacted COBB in advance and they advised uninstalling before testing. I did so, and drove to properly to the testing station the next day, probably 2 miles or less.
Anyway, the car failed because none of the mission controls had enough time to reset themselves after the ECU was re-flashed. The guy at the testing station asked me if I had replaced the battery. Of course!
I drove it for a few days, probably 100 miles, and had it re-tested today, and passed no problem.
Hopefully someone else can avoid this hassle in the future.
I contacted COBB in advance and they advised uninstalling before testing. I did so, and drove to properly to the testing station the next day, probably 2 miles or less.
Anyway, the car failed because none of the mission controls had enough time to reset themselves after the ECU was re-flashed. The guy at the testing station asked me if I had replaced the battery. Of course!
I drove it for a few days, probably 100 miles, and had it re-tested today, and passed no problem.
Hopefully someone else can avoid this hassle in the future.
07-07-2017, 03:46 AM
#2
Glad you got this solved. O2 readiness is a PITA.
To complete the PSA, O2 sensors require 30-50 miles of varied driving before they will show as "Ready". This goes for any hard reset to your ECU (i.e., reflash, battery swap, etc.).
To complete the PSA, O2 sensors require 30-50 miles of varied driving before they will show as "Ready". This goes for any hard reset to your ECU (i.e., reflash, battery swap, etc.).
07-07-2017, 04:46 PM
#4
Had the same issue on a car I bought from out of state where the battery had run low. Took about 20 minutes of freeway driving to get it to reset.
07-07-2017, 07:02 PM
#5
Racer
Thread Starter
Roberttran: no there was nothing actually wrong with the car and everything was functioning normally. It's just a quirk of the electronics that it takes some driving after resetting the ECU to get everything to register properly for the emissions inspection.
07-07-2017, 07:34 PM
#6
I have a Cobb access port, and love the tune for my 991.1. In Connecticut the car needs the mission testing every two years. Essentially they plug something into the OBD 2 port and determine if all the emissions components are functional. $20 for the trouble.
I contacted COBB in advance and they advised uninstalling before testing. I did so, and drove to properly to the testing station the next day, probably 2 miles or less.
Anyway, the car failed because none of the mission controls had enough time to reset themselves after the ECU was re-flashed. The guy at the testing station asked me if I had replaced the battery. Of course!
I drove it for a few days, probably 100 miles, and had it re-tested today, and passed no problem.
Hopefully someone else can avoid this hassle in the future.
I contacted COBB in advance and they advised uninstalling before testing. I did so, and drove to properly to the testing station the next day, probably 2 miles or less.
Anyway, the car failed because none of the mission controls had enough time to reset themselves after the ECU was re-flashed. The guy at the testing station asked me if I had replaced the battery. Of course!
I drove it for a few days, probably 100 miles, and had it re-tested today, and passed no problem.
Hopefully someone else can avoid this hassle in the future.
Start engine, idle cold for approx. 2 min, 10 secs.
Accelerate to 20-30 MPH, Maintain steady speed for approx 3 min, 15 secs.
Accelerate to 40-60 MPH, Maintain steady speed for approx 15 mins.
Decelerate and come to a stop. Idle in gear* for approx 5 mins.
^^^^ must be done twice
07-07-2017, 09:56 PM
#7
Rennlist Member
A quick search will show a ton of threads about resetting the sensors. The procedure is detailed and not to exceed 3,000 RPM:
Start engine, idle cold for approx. 2 min, 10 secs.
Accelerate to 20-30 MPH, Maintain steady speed for approx 3 min, 15 secs.
Accelerate to 40-60 MPH, Maintain steady speed for approx 15 mins.
Decelerate and come to a stop. Idle in gear* for approx 5 mins.
^^^^ must be done twice
Start engine, idle cold for approx. 2 min, 10 secs.
Accelerate to 20-30 MPH, Maintain steady speed for approx 3 min, 15 secs.
Accelerate to 40-60 MPH, Maintain steady speed for approx 15 mins.
Decelerate and come to a stop. Idle in gear* for approx 5 mins.
^^^^ must be done twice
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07-08-2017, 01:28 PM
#8
Rennlist Member
