Catalyst Drive Cycle

Tiny
CLEVENHAGENJS
  • MEMBER
  • 2000 CHEVROLET TRACKER
  • 2.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 160,000 MILES
I had new front and rear catalyst put on/gaskets/O2 sensors both bank 1 and 2. When going through the drive cycle all monitors set except for the catalyst one. I Have a few questions;

I need help and a quick way to solve this with the drive trace or cycle needed to be done exactly for the catalyst to set ready.

(I am not near freeway within 15 minutes, so I would need something I could do, so that I could drive to the freeway then perform that drive cycle to complete it.
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Thursday, May 19th, 2016 AT 7:26 PM

7 Replies

Tiny
HMAC300
  • EXPERT
If you mean check engine light is still on then have a autoparts remove the codes. If you replaced all that stuff for the original codes. If the light was off now on check for an air leak between engine and cat converter.
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Friday, May 20th, 2016 AT 7:37 AM
Tiny
CLEVENHAGENJS
  • MEMBER
This answer has no relevance to my question- Not at all-
There are NO check engine Codes at all-

I need a specific OBD drive cycle to set the Catalyst in the Monitors.

Are you able to help me?

Thanks,
J
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Friday, May 20th, 2016 AT 11:42 AM
Tiny
CLEVENHAGENJS
  • MEMBER
I need info like this for my specific vehicle

http://genisysotc.com/pdfs/DriveabilityDiagnostics.pdf

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Friday, May 20th, 2016 AT 11:45 AM
Tiny
HMAC300
  • EXPERT
The catalyst is set as soon as you start the car and the computer relearns as you drive you need to do nothing.
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Friday, May 20th, 2016 AT 11:59 AM
Tiny
CLEVENHAGENJS
  • MEMBER
I will re-post the question, please let someone (A expert_ who is familiar and knows about drive cycles answer, your help has been nil, Just blanket statements that are irrelevant.
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Saturday, May 21st, 2016 AT 10:04 AM
Tiny
CLEVENHAGENJS
  • MEMBER
Hmac300- Since your not "Familiar" with what a drive cycle is, This is a "Generic" GM OBD2 one-

General Motors Driving Cycle

A complete driving cycle should perform diagnostics on all systems. A complete driving cycle can be done in under fifteen minutes.

To perform an OBDII Driving cycle do the following:

Cold Start. In order to be classified as a cold start the engine coolant temperature must be below 50 C (122 F) and within 6 C (11 F) of the ambient air temperature at startup. Do not leave the key on prior to the cold start or the heated oxygen sensor diagnostic may not run.
Idle. The engine must be run for two and a half minutes with the air conditioner on and rear defroster on. The more electrical load you can apply the better. This will test the O2 heater, Passive Air, Purge "No Flow", Misfire and if closed loop is achieved, Fuel Trim.
Accelerate. Turn off the air conditioner and all the other loads and apply half throttle until 88km/hr (55mph) is reached. During this time the Misfire, Fuel Trim, and Purge Flow diagnostics will be performed.
Hold Steady Speed. Hold a steady speed of 88km/hr (55mph) for 3 minutes. During this time the O2 response, air Intrusive, EGR, Purge, Misfire, and Fuel Trim diagnostics will be performed.
Decelerate. Let off the accelerator pedal. Do not shift, touch the brake or clutch. It is important to let the vehicle coast along gradually slowing down to 32km/hr (20 mph). During this time the EGR, Purge and Fuel Trim diagnostics will be performed.
Accelerate. Accelerate at 3/4 throttle until 88-96 km/hr (55-60mph). This will perform the same diagnostics as in step 3.
Hold Steady Speed. Hold a steady speed of 88km/hr (55mph) for five minutes. During this time, in addition to the diagnostics performed in step 4, the catalyst monitor diagnostics will be performed. If the catalyst is marginal or the battery has been disconnected, it may take 5 complete driving cycles to determine the state of the catalyst.
Decelerate. This will perform the same diagnostics as in step 5. Again, don't press the clutch or brakes or shift gears.

SCHOOLED
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Saturday, May 21st, 2016 AT 10:20 AM
Tiny
HMAC300
  • EXPERT
What you posted is a training manaula for scope usage and I don't think you will find your answer here because most guys like me fix and car and broom it. When a part is replaced. Some guys use scopes or mode 6 but as far as resetting your catalyst monitors then that is something that is done in programming which I think you are trying to do probably because of a modified engine. Good luck in your search
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Saturday, May 21st, 2016 AT 10:23 AM

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