circuitsmith wrote:Has the MAF sensor been cleaned lately?

No I have not but I will.

That error message started coming up at 198k. I used an AMSOIL product and within 5 miles the check light went out. It came back on at about 203k and another container of AMSOIL turned it off. I'm not at 210 and the engine light hasn't come back on. What Amsoil product did you use? Was it a gas add...

Looks like you've been very through. Has the intake manifold gasket been checked? P0420 means it's not getting the right air/fuel mixture. Too much air, or too little air. Figure out what one. http://engine-codes.com/p0420_toyota.html" onclick="window.open(this.href);return false; The man...

The oil consumption is fine. We just changed the oil today as a matter of fact and after 5000ish miles it went threw 3/4th of a quart. The car has 136,xxx miles on it. As for the fuel mileage we are going to check it this week. Last time it was checked it was 30mpg. There has not been any other code...

I had a catalytic converter go bad so I went to a local shop which then replaced it and in less than 4,000 miles the new one went bad. I had the O2 Sensors checked by a different mechanic and they were performing properly. This indicated that the catalytic converter had poor performance. I then went...