Does anyone know how many miles you need to drive after resetting your ecu before you can get an emissions test?

 

10 should do it, glad it wasn't a thread about nocturnal emissions B===D----

 

lulz

 

That happens when you eat too many of Dave's burgers lol.

 

Ive never heard of that, whats the reason for driving after resetting the ecu?

 

doesn't the ecu need data to pull out for emissions? 0 data on the reset? my guess.

 

Driving will allow the emission system sensors to check your engine and report back to the ECU. Without the sensors establishing the all clear, the state will plug into your OBD port and see that your four parameters are not ready and they'll fail your emission test. Similar to throwing a code (e.g. P1283 or P0300) and your CEL is on.

 

It could take alot more than ten miles for the ecu to test all of the systems on your car.They all have different criteria from them to be active.Rescan the car before you waste time at the dot to make sure they have all passed or you wont pass the test.

 

Typically it is NOT only the mileage that determines the setting of OBDII status. Drive cycles and sensor thresholds all come into play. Just drive around regularly for 3-4days. That should do the trick unless you only drive 1 or 2 miles in between.

Alfred

 

^ He is correct. The reason they do this so you don't simply clear a code and go down to the emissions place to pass. If there is indeed a sensor out of range, then the time it takes to reset the ecu gives the ecu a chance to take a look at the sensor operation.

It goes both ways. Sometimes the ecu will throw a code for a good sensor. A reset (or a code clearance you can do from an OBDII scanner like I have) will give that sensor a 2nd chance. VS just replacing it when it wasn't bad.

 

I don't know what year Z you have, but for the 2003 models, the manual gives you the procedure for resetting the ECU for emission testing. The info is on page 9-21.

Here is a copy of the information:
Due to legal requirements in some states/
areas, your vehicle may be required to be in what
is called the ªready conditionº for an
Inspection/Maintenance (I/M) test of the emission
control system.
The vehicle is set to the ªready conditionº when
it is driven through certain driving patterns.
Usually, the ªready conditionº can be obtained
by ordinary usage of the vehicle.
If a powertrain system component is repaired or
the battery is disconnected, the vehicle may be
reset to a not ªready conditionº. Before taking
the I/M test, drive the vehicle through the following
pattern to set the vehicle to the ready
condition. If you cannot or do not want to
perform the driving pattern, a NISSAN dealer
can conduct it for you.
WARNING
Always drive the vehicle in a safe and
prudent manner according to traffic
conditions, and obey all traffic laws.
1. Start the engine. Allow the engine to idle until
the engine coolant temperature gauge needle
points between the C and H (normal operating
temperature).
2. Accelerate the vehicle to 55 MPH (88 km/h),
then quickly release the accelerator pedal
completely and keep it released for at least 6
seconds.
3. Quickly depress the accelerator pedal for a
moment, then drive the vehicle at a speed of
53 to 60 MPH (86 to 96 km/h) for at least 5
minutes.
4. Stop the vehicle. Leave the engine running.
5. Accelerate the vehicle to 35 MPH (55 km/h)
and maintain the speed for 20 seconds.
6. Repeat steps 4 and 5 at least 3 times.
7. Accelerate the vehicle to 55 MPH (88 km/h)
and maintain the speed for at least 3 minutes.
8. Stop the vehicle. Place the automatic transmission
gear selector lever in the P (Park) or
N (Neutral) position or the manual transmission
shift lever in the N position.
9. Turn the engine off.
10.Repeat steps 1 through 8 at least one more
time.
If step 1 through 7 is interrupted, repeat the
preceding step. Any safe driving mode is acceptable
between steps. Do not stop the engine
until step 7 is completed.

Hope this info helps.......................

 

That is pretty darn interesting ...

 

And the answer is somewhere between 0 and 92 miles ...

PASSED!!!!!!!!!!!!!!!