Your smog technician is correct. While replacing your Nissan's battery the emission computer "lost" it's "readiness" data. Follow the OBD II Drive Cycle below in order to set your Nissan's emission monitors.
This OBDII drive cycle begins with a cold start (coolant temperature below 122 degrees F). We recommend achieving this by allowing the vehicle
to cool down overnight, and beginning the drive cycle process the following day.
Take extra caution while performing dirve cycles on public roadways. Drive cycles can be difficult to follow under normal driving conditions. Begin by:
- Start the engine. Idle the engine in drive for two and a half minutes with the A/C and rear defroster on.
- Turn the A/C and rear defrost off, and accelerate to 55 mph at half throttle.
- Hold at a steady speed of 55 mph for three minutes.
- Decelerate (coast down) to 20 mph without braking or depressing the clutch.
- Accelerate back to 55 to 60 mph at ¾ throttle.
- Hold at a steady speed of 55 to 60 mph for five minutes.
- Decelerate (coast down) to a stop without braking.
If all other emissions systems are functioning properly, completing the drive cycle above will set the "readiness flags" required to pass the
smog check. It will not hurt to perform the drive cycle 2 or 3 times before the smog test.
posted by SmogTips Support
