Question about 1997 Nissan Maxima

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My 97 maxiam is failing emissions becasue the erg, cat and one other sensor is "not ready". I have driven it for a few weeks checking it regulary and it has stayed the same. Any idea when or what to do so they will turn ready

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Best advice here is to change the cat and the sensor all in one go as they do give up after around 150.000 miles ,Now here they put a probe up the exhaust for the test because if they didnt then every vehicle in europe except some american imports like chrysler jeep would fail the test because its impossible to read a europeon build vehicle as encrypted software is used .This gets me when i answer questions on here and they have the fault codes as i am lucky if i can read the chassis number .

Posted on Nov 02, 2010

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What does "not ready" mean?

A service technician will turn off the dashboard "check engine" light after most repairs. This resets the vehicle's emission system components to "not ready". The status remains "not ready" until the vehicle's computer has had adequate time to review the repaired component. This happens after the vehicle is driven for a period of time established by the manufacturer.

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For initial and subsequent tests, if a dashboard light is on when the vehicle is presented at the E-Check station, the vehicle will fail the test.


How can the vehicle status be made ready?

When a vehicle is driven through its normal drive cycle, the computer reviews the emission control
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