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Failed emisssions OBC is not ready when I went for emissions inspection, battery was replaced 300 miles ago, any idea how to reset OBC or has anyone found another problem when this happens?

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6 Suggested Answers

  • 65 Answers

SOURCE: EMISSIONS INSPECTION FAILED

you can try this unplug the batt. from ground. let it set for 30min.put it back but still you need to replace the main pproblems if this dont work

Posted on Feb 26, 2009

daves944
  • 1050 Answers

SOURCE: pcm not ready, NYS inspection, 1997 Saturn SL-1

Performing a GM OBDII Driving cycle:

  1. Cold Start. In order to be classified as a cold start the engine coolant temperature must be below 122°F (50°C) and within 11°F (6°C) of the ambient air temperature at startup.
    Do not leave the key in prior to the cold start or the heated oxygen sensor diagnostic may not run.
  2. 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.
  3. Accelerate. Turn off the air conditioner and all the other loads and apply half throttle until 55mph (88km/hr) is reached. During this time the Misfire, Fuel Trim, and Purge Flow diagnostics will be performed.
  4. Hold Steady Speed. Hold a steady speed of 55mph (88km/hr) for 3 minutes. During this time the O2 response, air Intrusive, EGR, Purge, Misfire, and Fuel Trim diagnostics will be performed.
  5. 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 20 mph (32km/hr). During this time the EGR, Purge and Fuel Trim diagnostics will be performed.
  6. Accelerate. Accelerate at 3/4 throttle until 55-60mph (88-96 km/hr). This will perform the same diagnostics as in step 3.
  7. Hold Steady Speed. Hold a steady speed of 55mph (88km/hr) 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.
  8. Decelerate. This will perform the same diagnostics as in step 5. Again, don't press the clutch or brakes or shift gears.

Posted on Mar 21, 2009

  • 1 Answer

SOURCE: EMISSIONS INSPECTION FAILED

This just means that the OBD was reset recently and the car hasnt been driven enough for readings to be given by the OBDII. Just drive the car a while, and then all should be READY. After any OBDII reset, the car must go through a certain number of "Drive Cycles" before the OBDII will emit any readings. Refer to the manufacturer to find out exactly how many, and how to complete them.

Posted on Apr 22, 2009

onyxvu
  • 74 Answers

SOURCE: Computer readiness will not reset. Will not pass insepection.

check all your fuses, there may also be a code about to set. the timeframe depends on your driving habits. or it could be the garage you are taking it to. ask them for a "drive cycle" printout. this is a form that explains the exact driving conditions for your vehicle to reset the monitors. you could also try taking it to autozone- they can tell you if it is ready or not.

Posted on May 26, 2009

  • 3 Answers

SOURCE: on-board computer not ready for emission

The car has not been driven enough to make the computer ready for emissions testing. you will need to complete a certain drive cycle for each emissions component to be tested by the computer. it is a variation of highway and non highway driving. you may need to go to a shop and have the computer read to see which component is not ready. It may be faulty

Posted on Sep 14, 2009

morse008
  • 1111 Answers

SOURCE: Need to reset he computer for 99 Maxima for emissions in spection

Resetting the computer is usually done by disconnecting the negative terminal on the battery for a few minutes then reattach.

Posted on Nov 06, 2009

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