Emissions failure due to obd
Asked by Ian Feb 02, 2018 at 09:52 PM about the 1997 Subaru Legacy GT Wagon AWD
Question type: General
No issue with OBD connector when vehicle is off and in second key position.
Vehicle will not pass state(GA) emissions test when instructed to have vehicle
idle with DLC in OBD connector. Fails everytime.
9 Answers
beatupchevy answered 6 years ago
make sure the idle is actually part of the test , your car probably runs fine and serves you well but without that sticker it's basically worthless , but we have to save the environment , the polar bears hate you
It had a knock sensor fault that was fixed with replacement of the sensor, it's gone through readiness checks and CEL is off now. The EMI tester states "turn vehicle on and let idle", it doesn't pick up the RPM's through OBD connection.
TheSubaruGuruBoston answered 6 years ago
Hmmm...tach and odo operate normally? Then speed sensor is probably ok. What is the CEL code when it recurs? Let's hope you don't have to chase a used ECM.
The CEL hasn't come back on since the bank 1 knock sensor was replaced. I've driven about 280 miles to get the vehicle to go through readiness and see still no CEL. That's why I attempted an EMI. No stored codes and it runs great. Checked the pins on OBD connection and everything checked good.
TheSubaruGuruBoston answered 6 years ago
Weird. Maybe it hasn't booted up completely? Drive for awhile and retest. BTW there's one knock sensor.
All readiness components have been completed. That's why I attempted the EMI. I'm pretty sure that covers "emissions sensors".
