ODB II readiness help
06-08-2006, 06:16 PM
#1
Instructor
Thread Starter
ODB II readiness help
Recently I had the G5X3 cam installed in my 02 Z06. I am having a problem with getting the ODB II back to rediness status, I drove the car about 500 miles and still nothing. I am looking for readiness on the O2 sensor heater and catalyst efficiency. Does anyone know how to get the system back to readiness?
06-08-2006, 07:24 PM
#2
Originally Posted by B's Z06
Recently I had the G5X3 cam installed in my 02 Z06. I am having a problem with getting the ODB II back to rediness status, I drove the car about 500 miles and still nothing. I am looking for readiness on the O2 sensor heater and catalyst efficiency. Does anyone know how to get the system back to readiness?
06-08-2006, 08:30 PM
#4
Race Director
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CI 6-7-8-9-10 Veteran
St. Jude Donor '03
Originally Posted by vettenuts
Thre rears? Why not just shut them off?
Someone will correct me if I'm wrong, but as I understand it, if the rear 02 sensors are edited out during the tuning process, they will forever show as being in a "not ready" state.
06-09-2006, 12:14 PM
#5
Originally Posted by Y2Kvert4me
Sounds like that might be his problem.
Someone will correct me if I'm wrong, but as I understand it, if the rear 02 sensors are edited out during the tuning process, they will forever show as being in a "not ready" state.
Someone will correct me if I'm wrong, but as I understand it, if the rear 02 sensors are edited out during the tuning process, they will forever show as being in a "not ready" state.
06-09-2006, 03:39 PM
#6
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In HPTuners and I would assume LS1 Edit and EFI Live they are not really edited out or deleted. Instead they are changed to "no error reported", which the PCM reports as ready.
06-09-2006, 04:00 PM
#7
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The cat test will not run until the all the O2 sensors are ready. Some of the O2 tests are done during a cold startup, others are done warm.
Courtesy of Patches:
General Motors OBD-II driving cycle
• 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 start-up. 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 or 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.
Courtesy of Patches:
General Motors OBD-II driving cycle
• 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 start-up. 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 or 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.
06-09-2006, 04:29 PM
#8
Team Owner
Originally Posted by SFVetteman
In HPTuners and I would assume LS1 Edit and EFI Live they are not really edited out or deleted. Instead they are changed to "no error reported", which the PCM reports as ready.
