X15 1659 Code

[Rawze]

(11-01-2023 )DVT873 Wrote:  "Replace the Exhaust pressure sensor and clean out the passageway thru the thermostat housing and the hose feeding it from the manifold. - Cylinder mis-fire detection is done via this sensor and passageway."
Could you explain a little bit about how that works? Is it measuring and comparing the exhaust pulses as the exhaust valves open?

ECM monitors the sound waves via the sensor and compares them to the cylinder that was supposed to make them. -- yup, it actually does this.. and after-garbage exhaust pressure sensors like dorman, etc.. are notorious for throwing false cylinder mis-fire codes.