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Forum > Failed Smog Test > Question

1995 Nissan SX200 failed for high NO. What can be the cause?

My car failed smog test for NOX with a reading of MAX 716 Ave 313 MEAS 747. Can you tell me what the likely problems is?

Answer:

Nitrous Oxide or NO is created when your Nissan SX 200's engine combustion chamber temperature reaches over 2500F. Nissan has designed several systems, which when working properly, lower nitrous oxide emissions. Follow the link below to learn more about common Nissan 200SX high NO faults, and engine problems which cause high NOx emissions: www.smogtips.com/failed-high-NO-nitrous-oxide.cfm posted by SmogTips Support

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