91 240 failed emissions nox high
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rsstrong88
- Posts: 1
- Joined: 13 Sep 2012, 10:50
- Year and Model: 240 1991
- Location: Buford, ga
91 240 failed ga emissions for high nox only on high rpm test. read a 121 code so replaced maf sensor. Re-tested and still failed but it did heip. Checked codes again and read 311 and 121 again any suggestion.
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russellengineering
- Posts: 36
- Joined: 12 Mar 2010, 20:02
- Year and Model: 940, 1993
- Location: atlanta
Hi,
Pull down and print the downloads on the top of the board about the OBD engine codes. 311 code and the Model 240 is discussed along with diagnosing the speedometer signal. I guess if you test the wiring and are failing you can go from there about what to replace.
Good luck,
Dave
Pull down and print the downloads on the top of the board about the OBD engine codes. 311 code and the Model 240 is discussed along with diagnosing the speedometer signal. I guess if you test the wiring and are failing you can go from there about what to replace.
Good luck,
Dave
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