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Old 10-13-2019, 09:34 PM
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smj999smj smj999smj is offline
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2006 Pathfinder
2003 Frontier King Cab
2003 Frontier KC SVE 4x4
Join Date: Jun 2012
Location: Prospect, VA
Posts: 1,849

When it comes to spark plugs, it's best to stick with the original equipment plug, which would be NGK # 6240. Aftermarket plugs, especially Bosch platinum and Splitfire plugs, can cause performance issues with the engine. A bad oxygen sensor often causes an oxygen sensor code to trigger and if it's an upstream sensor, it can cause drivability issues by causing the engine to run too lean or too rich. Too lean can cause detonation which triggers the knock sensor. There are other things, however, than can cause an oxygen sensor and not be the sensor, itself. If an engine is running really lean, the oxygen sensor will respond with a consistent reading on the lean side and the ECM may interpret that as the oxygen sensor have an issue, triggering the code.
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