Posts Tagged: Honda check engine light

Honda P2646 Code: Why Your VTEC System Isn’t Working

Most Common Causes of P2646 on Honda Engines Quick Summary A P2646 trouble code on a Honda almost always traces back to the VTEC oil pressure control system. The Honda P2646 code means the engine computer isn’t seeing the correct oil pressure signal from the rocker arm oil pressure switch when the VTEC system activates. In simple terms, the engine can’t properly engage the variable valve timing system. The most common causes of P2646 include low engine oil, dirty or sludged oil, a clogged VTEC screen filter, a failing VTEC … Read More