Re: 2001 Ranger check engine 0401
I replaced the DPFE sensor and have driven about 100 miles with no check engine light. I am still getting pinging under light loads, could be the carbon problem. I was hoping getting the EGR working would stop it as it reduces the combustion chamber temp.
I am leary of that carbon procedure which flushes the crap out of the engine and could mess up 02 sensors or who know what. But its got 94K miles of highway cruising, so with the overdrive could have created a lot of carbon buildup.