Contour Enthusiasts Group Archives Forums General Troubleshooting CEL Code Reading Problem?

I took the 'ol Tour (only 27,000km) through our local "Air Care" test and it failed. NOx levels are really over the top. Everything else OK. CEL light doesn't light up until three days after the test. Figures! Waste of $50 for the test.
Anyway, I took it to my buddy's shop to get the codes. He has a SNAP-On reader with their latest software. We were able to get a data stream but gave an error "Unable to complete test" We tried another reader/software combo with the same result. Couldn't get the codes but were able to reset them.

Any ideas? Car running fine so I'm stumped. Maybe the IAC or EGR?

My next step is to take it to Ford Dealer for their computer
diagnostics (some BS $135 Cdn. quote)

I'm really hoping the computer isn't hooped.

Cheers

GO 'NUCKS GO!

The most typical reasons for high NOx emissions are reduced EGR flow and lean mixture.

Reduced EGR flow is often corrected by cleaning the buildup from the EGR passages in the upper intake (behind the throttle body gasket).

A lean condition often happens over time as the MAF element gets dirty from dust in the incoming air. Try cleaning it. Air leaks in the intake system are fairly common but usually cause driveability problems.

Consult the FAQ or search for more info on these cleaning procedures.