LEX300AM

I have problem with Chk Eng light. I went to Auto zone. They gave me 5 different code.
Code : p0100 p0110,p0330,p1410,p1411,,. I also went to couple other and they all say for thorough check could cost up to TWO hrs for diagnostic. Then I went to Lexus dealer. They recommended Mass air flow , Knock sensors and last thing replace O2 sensors. I am not sure how all three things goes at the same time. Can some one tell me better way to fix this one without paying $2500.
Thanks

Bdub215

iTrader: (1)

take your chances on the J-yard. or google around for the parts and see what you come up with.

Hacc

well bro u have no choice but to change all these parts..,
i had a check light on ...and had to change a couple of sensors ,,but still check light blinks at times

LEX300AM

Thnaks
But I am looking in to cleaning MAF sensor.Is ther any thread for how to clean MAF sensor. I found one site that shows how to for RX300 model. O2 sensor will be next. Is it possible this codes are on because I used fuel injector cleaner ? Chk Engine light came after I started using fuel injector.

Lexmex

The one that I did over in the RX300 forum, https://www.clublexus.com/forums/sho...d.php?t=295546 is one of those. CRC MAF sensor cleaner is a good one to use (I couldn't get it when I was in Mexico).

Yes, on fuel injector cleaner and check engine light. I have actually run a gas analysis test (a clone of an emissions test) before and after I put in some fuel injector cleaner (Techron) and you could see the difference, especially in HC (hydrocarbon) count. Wait until your next tank of gas to evaluate.

I'd also reset the battery (not just clearing the codes) and see what happens on the next tank of gas.

Generally, when those knock sensor codes pop up, they are the problem to tackle first. Those don't seem to go away from experience I have seen with others.

LEX300AM

Thanks LEXMEX.
I also tried guranty pass emission test. That gas of tank is done. I have used Lucas fuel injector cleaner and lubricant. That gas tank is still running. I am going to clean MAF and then try reset battery. Hopefully it will work. Thanks for your help.

Lexmex

My favorite fuel injector cleaner of the bunch has been the Redline Fuel System Cleaner (Pep Boys is the place I usually see it at), only about $8.

LEX300AM

Here is an update on my lex. I cleaned MAF sensor, throtle air intake (was gunky). Then I checked code again. To my surprise only one code was left out of 5 different. Only code left was for Knock sensor. I was able to replaced that with my friend. I drove few miles, no chk eng. light. but when I went over 60 mph on highway light came back on. This time its insuficency of air. I believe may be one of the hose not connected ? Do you thing may be I need to drive certain miles before code disappear ? or this my be a new code ? I went for inspection with chk eng light reset. It failed, No codes but because it was reset and not enough data ? I need some help. I check all hoses, it seems all looks oK.

Lexmex

Was it P0171?

LEX300AM

I do not know code because my son took car to
autozone and he forgot what code it was but I will find out later.

thanks

ProfessorP

good possibility it's a faulty O2 sensor. I've had to change mine twice on my 97 ES300, once at around 70K and once at 150K.

Bdub215

iTrader: (1)

check the air filter? i say that because air goes into the engine one way. also make sure the intake hose is on properly.

LEX300AM

Sorry, I could not return here this weekend, Good news is all my codes gone now. I have to drive little bit then off for inspection. After replacing Knock sensor. I checked with Autozone for code and it was P0401. It has to do with EGR system. So I removed engine cover and checking all hoses and ther it was. One of the hose (small) was loose and part of the plastic tube was broken.I almost wanted to go back to Autozone and order that parts but then I decided to glue it, Let it dry and put that part back. and NO MORE CHK engine light coming back.I don,t know that part name but hose that come out of EGR valve and goes under engine cover. Apparently during knock sensor change somehow it broke. Does anyone know how many miles to drive before ECM data become valid for inspection ? I can not belive Lexus dealer wanted $ 2500 for repair and I got that problem fixed for $ 175. Also wants to thank to all of you that gave me confidence and information. Please keep up good work.