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Ron
Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 23001
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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My car can't pass smog test. It's a 2000 Ford Taurus wagon.

Customer Question

My car can't pass smog test. It's a 2000 Ford Taurus wagon.
Had mass air flow sensor replaced and was told to drive the
car 70 plus miles on the fwy and then drve through town
and bring it back to be tested. Did this several times and it
still won't pass. Any suggestions?
Submitted: 6 months ago.
Category: Ford
Expert:  Steve replied 6 months ago.

What is the code that is causing your car to fail the test?

Customer: replied 6 months ago.
I don't have that info...the smog receipt says OBDH "not ready"
OBDH Monitors not ready
Catalyst
Oxygen sensor
Evaporative System
Oxygen Sensor heater
Customer: replied 6 months ago.
Does that help?
Expert:  Steve replied 6 months ago.

The reason for that concern is because the computer cannot finish testing. You may have a sensor that is bad but not bad enough to set a code stopping the computer from testing all the sensors.

Expert:  Steve replied 6 months ago.

The most common sensor I run into is the fuel tank pressure sensor is bad and not allowing the fuel leak check.

Customer: replied 6 months ago.
Thanks but I've already spent a lot of money on this problem and I can't afford you now...
sorry but thanks anyway.
Expert:  Steve replied 6 months ago.

Does your state have a waiver?

Expert:  Steve replied 6 months ago.

Also make sure the tank is between 1/4 and 3/4 tanks full not full throttle or the test starts over. Also drive a steady speed on the freeway for 5 miles without stopping and drive 5 miles around 40mph at steady speed no stopping to pass the test.