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Toyota Tundra Engine Issues

ppisanoppisano Posts: 16
I have the 03 v8 with 58k,, I started to get the po156 code for check engine. I replaced the correct sensor but just received the same stating "circuit malfunction". ive read here that there could be a heat issue to close to other pipes or something like that. Any ideas would be grand at this point.
cat system going bad??


  • I saw your post and this might be related.
    I have a 2000 Tundra. Last week the check engine light came on. My mechanic got a po135 code. He said it was for an oxygen sensor problem. He's a toyota mechanic but not a dealer. He heard there was an issue with Tundra oxygen sensors and suggested I contact toyota to see if it was a recall. If it was covered it could save me $250 plus labor. He's an honest guy. I tried the toyota web site, 800 number and the local dealer and none had any notices or recalls. I spoke with him today and he said try again, he thought there was a notice or something but he doesn't have any more information. He said some bad parts don't get recalled, they call it a campaign? They won't contact all the owners and offer the repair but if you ask they'll pay for it. At the least we can get counted as another owner with the problem that may eventually lead to a recall or campaign.

    I'm going to try again to see if I can find any assistance. I'll keep you posted. Please let me know if you learn anything. If anyone else has information to add it would be appreciated.
  • ppisanoppisano Posts: 16
    great thanks, the sensor was replaced after the first code then another came back about two weeks later. I have a few things to consider still, like the mass air flow sensor cleaning, is it the cat actually failing, there's nothing left to replace after that point.
    I'll keep you in the loop.
  • ppisanoppisano Posts: 16
    ok, the update.
    I replaced the spark plugs, I cleaned the KN mass air flow sensor. 300miles later I got the po161 code again. I'm really perplexed right now, I just may replace the cat system as thats all that left for thet system (i think), remember I already replced the 02 sensor and the code came back. I'm assuming it's noty the new sensor.
    Maybe replace the cat system.
    Any ideas left??
  • I am wondering will things function without these o2 sensors. Is there a way around it somehow?
  • ppisanoppisano Posts: 16
    Morning all, I have a 03 tundra and when my shifter is placed in "drive" the little green light won't come on, but when i shift anywhere else all the rest of lghts work fine (reverse, park ect...)
    Anyone have this one happen before???? any guesses???
  • gts4gts4 Posts: 2
    I have a 2004 toyota tundra I just bought and notice that when I start it up when cold I get a lot of blue smoke for a few minutes than goes away I had it check out at the dealer and they said everything was fine, I really don't like it, I did not notice this when I bought it two months ago, could it be the oil? its running standard 5-30 oil,they say no, some say use synthetic oil does this help? I only have 36000 miles on it, it does have a superchager and headers with daul exhaust from the factory. any info would help.
  • ltdan2ltdan2 Posts: 17
    it sounds like worn rings or valvue guides.have a compression test run to see if all the cyl. are equal & up to factory spec.
  • alpsalps Posts: 2
    I was a diesel engine mechanic in the navy a long time ago,
    the other party that replied to you, is probably correct. I
    would probably suspect the valve seals and or the rings as
    the rulpret. And I want to ask, a supercharger or a turbo-
    charger. There is a distinct difference. Is it belt driven,
    or powered off of the exhaust. If this is the case, either
    way you are probably running to much boost; which would
    cause the seals on the valve or too much boost would be
    putting too much pressure to the indiviual block bores. That
    maybe why you are experiencing the deadly blue smoke. Be
  • buzzwabuzzwa Posts: 3
    Did anyone ever post a link to a PDF on changing the oil filter? What a hassle. Other than this, I love my truck!
  • I need that too. I put the o-ring in the wrong place at first ( at the bottom and not in the groove ) and now have a very , very minor leak from the bottom of the filter housing. I think i streched/niked the o-ring . The leak is hardly noticeable but drives me crazy. Of course the girlfriend says i should have taken it to the dealer for an oil change
  • I have a 2007 Tundra with the 5.7L engine. I was just wondering for all the people with the same engine size, how high your truck RPM's jump to in the morning startup, and about how long it takes before the RPM's drop below 1000. My truck's RPM's jump to about 2000 RPM's and don't drop below 1000 until about 45 seconds to a minute after startup. I know all about cold startups and how its normal for the RPM's to be higher in the morning due to colder temperatures, but I dont ever remember my truck's RPM's jumping that high and taking so long to lower to a normal RPM. So Im just curious as to how your trucks are in the morning?
  • I was told that on some Toyota vehicles that you have to replace the mass air flow sensor to realize the full benefit of a cold air intake system. Is this true? I am also curious as to the noise level of the Borla cat back system. I have decided to spend some money on my current Tundra to prevent the purchase of a new one. Thanks.
  • I have a 4.0 v6 2006 SR5 Tundra. Each time I start the truck it takes the oil pressure guage almost 6 seconds before it will register. In other words, after I start the engine, the guage reads zero pressure for about 6 seconds then it will shoot up to about midway. Has anyone else had this experience?
  • how do you change the air fliter on the toyota tundra?
  • I have a 2008 tundra and i have the same thing. Mine will rev to about 1800 rpm when i first start it the morning and hold that for about a minute, and then it will gradually start to come back.I only have 600 miles on it and will take it in and see if this is normal for this engine. I also have an issue with the oil pressure which i'll take up with the service rep when i take it in.I'm like you in believeing that this is a little high of a rev when you first start it. I'll let you know what they say about it when i take it in.
  • Does anyone out there know what LSD stands for? It is with the traction control section of the 2008 owners manual .
  • According to the service rep i talked to about my 08 revving on a cold start, he said that was normal for that engine. So i guess i'll just hang on when i start it cold.
  • My 07 5.7 tundra 4x4 crewmax developed a lowend knock @ apprx 4k miles.After 2 visits to the dealer the factory rep approved a complete engine replacement at 5300 miles.I have only put 300 miles on new engine so the jury is still out on wether the new engine will be ok.This 5.7 doesn't seem to have that sewing machine smoothness of my previous 4.7 Tundra.My local dealer has already replaced two other 5.7 engines.So far my ownership experience with this truck has been a major disappointment.Anyone else out there with the same problem?
  • alpsalps Posts: 2
    Limited Slip Differential
  • Had 11 Toyota's for over 33 years and finally got my first bad one.....Engine, trans ecm does not play well together.....Engines knocks rattles sounds like the 6.0 diesel ford......trans shifts like crap..hard shifts, knocks......dealership took it in for 4 days and road tested it 4 miles and called and said it was nothing wrong with it but that I had put a aftermarket oil filter in it and that caused the engine to still had the orginal oil fill and filter from the factory.....Still got all my same problems.....Wife will not drive it, says she wants to get where she is going.....and back.......Wish Butler/Macon would trade me out of this problem....WOW A $33,000 white lemon......dave
  • I have 26,000 miles on my 2007 5.7 tundra. Dealer says the engine noise is normal - sounds like a diesel in the mornings and afternoon when you have low throttle settings (1200-2000 rpm). What do I tell the dealer to get them to do something? Loudest engine I have ever owned.
  • I have a 2002 toyota tundra extended cab,3.4 l engine.I called the local toyota dealership to get a price on replacing the 3 front belts.
    The service advisor advised me that the timing belt and water pump needed to be replaced at the same time with a cost of $800.00.
    The tundra has $122,000 miles and the above service has not been done.
    Is this the correct advice or is he trying to gouge me?
  • obyoneobyone Posts: 8,054
    What does your owner's manual say about replacing the timing belt?
  • Regarding replacing the timing belt and water pump. I have a 2002 Tacoma with 360,000 kms. (225,000 miles) and I have had the belt and pump replaced twice. The first time, I was shocked at the price, but the dealer has assured me that if the water pump fails, it takes the belt with it. Therefore, it is just false economy to replace one and not the other. I have since checked and they are telling the truth. Toyota always errors on the side of being safe and practical. You would be doubly ticked off if your water pump failed and took out the belt just after you paid for the belt to be replaced.

    By the way, this truck runs like a top, burns NO oil and is one of the best vehicles I have ever owned.
  • cskycsky Posts: 4
    Howdy -Jus looking for a little help on where to find a decent after market dual exhuast setup for my 05 tundra prefer a cat back setup .
    And I wanting to replace my bridgestone tires [I dont like these tires at all ,at 40 psi its like having skates on the front]

    I prefer an semi agressive ,heavy sidewall ,semi smooth ,semi quit ride,handles well with 40 to 50 psi , High milage [50,000 +]
    good on snow rain dry and off road,and will handle my travell trailer.
    This is a great truck and I couldnt be happier .
    Also has anyone out there converted there 4x4 front axle to lockers ?if so ,was pretty simple and affordable ?
  • apptunapptun Posts: 18
    I suggest a visit to your local independent muffler shop. I found that for under $300 you can get a nice sounding, cat back system . Just keep your original in case you change your mind. You can expect about five years of service life from this price range of system.The muffler will have a lifetime warranty and the pipes are aluminized. Someone should feel free to correct me if I have that terminology wrong. It is not all stainless but it is very reasonably priced, I put a set of Cooper tires on my tundra when the Bridgestones bit the dust at less than 30k.The originals were a big let down for me. Good luck.
  • obyoneobyone Posts: 8,054
    Go to tirerack and check out the Firestone Destination A/T.

    Best bang for the buck fulfills all your requirements.
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