2008 Honda Odyssey Right Engine Tapping Check Engine Light on. 173k miles.
Recently, a tapping noise began on the right (passenger) side of the engine. At first, we thought it was a loose rocker arm and were just going to do the work ourselves. It would go away the higher the RPM would rise. Idle = Tap, Drive = No tap. This was about 200 miles ago. We changed the oil last weekend, and now the check engine is on (constant) and the idle is rougher below 2000 rpm and the Maintenance Indicator Light alternates between constant on and constant blink. There is really nothing that would indicate why it blinks v. steady on.
We’ve done all periodic maintenance, changed the timing belt, etc. Syn oil every 4000mi. All filters per schedule, new plugs yearly after 100k.