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Toyota engine repair questions and answers

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  • AutoMD Member
    AutoMD Member - 2008 Toyota Camry - Engine - 5/24/2014
    VSC Warning Light came up on dashboard
    mileage 284,000. Just had an oil change, tires rotated, cabin filter and air filter replaced. While driving today the VSC warning came up on the dash. I remember this happening before and Toyota walked me thru it but can't remember what I did.
     
    0 answer
  • AutoMD Member
    AutoMD Member - 2013 Toyota Highlander - Engine - 5/22/2014
    What cause engine to vibrates, taps, rattles, and hesitate.
    Went to dealer for an oil change. Car uses 0W20 oil. The oil they use was a very thicker viscosity compare to the thinner oil that was in the car the day of purchase July 2013. Car came out vibrating, tapping, rattles, clanking noises. Dealer said it was the ...
     
    • GT500Knights
      5/22/2014 GT500Knights
      If the incorrect oil viscosity is used that will cause a lot of problems. Newer cars like yours have very close machined parts and surfaces, and very, very tight clearance. Lower viscosity oil is used for this reason, because it has better flow and can lubricate smaller spaces. If higher viscosity oil is used, such as 30 or 40, then the oil will not be able to reach critical engine components such as the valve train or even crank and piston bearings. What probably ended up happening is that, due to improper lubrication, the valvetrain (camshaft, lifters, rocker arms wore themselves to pieces. The tapping noise is the valvetrain. Hydraulic lifters aren't working properly and taking up the slack in the valvetrain causing the tapping you're hearing. I would take it to whoever did the oil change and have a word with them.
      GT500Knights
      5/22/2014 AutoMD Member
      Thank you so much GT500Knights
      I did a history report on this car which require 6.4 quarts of oil with filter. Each time the oil was change, the first time they put 6.0 with filter, 7.0 with filter, 5.0 with filter. Is this the reason why to tapping is happen? As you stated the valvetrain? Do fuel injectors taps and makes vibration? Dealer says that is normal for injectors to taps and vibrate the car. As you can see I dont no anything about engine. Please help me some more. Thank God for you
    • GT500Knights
      5/22/2014 GT500Knights
      Well lower than normal oil level can cause an issue during high rpm situations. While you're idling, maybe 2 quarts would remain within the oil pan. As the engine spins faster , so does the oil pump. If the incorrect amount of oil (too little) is used, what will happen is that as you step on the pedal and Rpms increase, so does the oil pump speed and the volume of oil it circulates. If the pump has no oil to suck up and pump, it will end up sucking air, and then pumps that through the system. Air between components of the engine is never a good thing.... Air doesn't lubricate. As far as the tapping noise, I've never heard of injectors making a tapping noise. It is possible since cars change all the time.
      GT500Knights
      5/22/2014 AutoMD Member
      I agree with you because this car was absolutely quiet the day I took it into the dealer for an oil change. There was absolutely no tapping or vibrations of any kind before I went into the service. I could not hear the engine running most of the time, because it was just that quiet. Now it sounds like a baby diesel and it is worse on an incline like in my driveway. My muffler shakes when I start the car up, do that suppose to happen? Thank you so much. You are really teaching me. :)
  • AutoMD Member
    AutoMD Member - 2002 Toyota Celica - Engine - 5/21/2014
    2002 Celica - CEL P0171 Lean Condition
    I have a CEL on with code P0171. When it is reset at auto place, usually stays that way when I drive home, but next morning it will be on again. It has been on and off for years. It used to stay off for months when reset. So far mechanic tried to clean MAS. I ...
     
    • GT500Knights
      5/19/2014 GT500Knights
      Your system is popping the lean code from two possibilities. First and most likely possibility is a vacuum leak, located somewhere after (and unmetered) by the maf sensor. Listen for any hissing sounds while your engine running. Try to locate the hissing / sucking noise. It's easier to do this with a length of 1/2" rubber vacuum hose. Hold one end to your ear and run the other end along the engine. When you place the hose over where the noise is coming from, it will be magnified. You can also try soapy water. Spray where you think the extra air is getting sucked into. The moment you spray soapy water onto the area of the engine that is leaking is when the engine will idle smoothly.

      Second, check air fuel ratio sensors. Don't just replace them--they are expensive. If you need diagnostic aids, let me know.
      GT500Knights
      5/21/2014 AutoMD Member
      Does the price seem reasonable for the work? And does the work seem reasonable? i.e., Do you think the fuel injection cleaning, and air filters really need replacing. (I have been told that shops often try to oversell fluid cleaning and replacements to make extra $)

      It might be worth noting that I am likely to sell/trade this car in, in the next 6 months. Not sure if its better to put the work into it (i.e. could get more for it) or if its better not to.

      Thanks in advance!
      GT500Knights
      5/21/2014 AutoMD Member
      So I took it to the other shop. This is what they are recommending...

      replace intake manifold gasket
      replace valve gasket
      fuel injection cleaning
      replace serpentine belt (cracked)
      replace air filters
      replace spark plugs (says he can't tell for sure if they are worn... but might as well replace while in there.... I am at 140k and not sure if they were replaced at any point (120k recommended)

      quoting something in the $800's.
    • GT500Knights
      5/21/2014 GT500Knights
      Price doesn't sound too bad for all the work. That's considering you're going to a reputable shop that charges around $120 per labor hour. Everything being replaced seems like it would help with your issues you're having. Especially the intake gasket. Sometimes those can get contaminated with oil and that mixed with heat and time makes them brittle and begin to crack. The valve cover gasket is only necessary if oil is leaking from the valve cover area, or into the spark plug holes. Spark plugs would be a good idea too especially if you're not sure the last time they were replaced.
      GT500Knights
      5/21/2014 AutoMD Member
      The shop is precision Tune. Someone on another forum had a very strong opinion that I should not let them touch my car. What do you think?
  • 64
    64 - 2002 Toyota Camry - Engine - 5/21/2014
    P1155 code on my 2002 toyota camry
    came from auto zone they says my code is p1155 definition air/ fuel sensor heater circuit bank 1 sensor 2.Also went to aamco they say its air fuel sensor heater circuit bank 2 who is right .can some one help I have a 2002 Toyota Camry XLE 6 Cyl 3.0L engine check ...
     
    • Jimm
      5/21/2014 Jimm
      P1155 = Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 2 Sensor 1

      The bank 2 is rearmost (next to the firewall) set of three (3) cylinders on the transverse-mounted V6 engine. The sensor 1 location would be the O2 oxygen sensor located ahead (upstream) of the catalytic converter.
      - Faulty Air-Fuel Ratio (A/F) Sensor Bank 2 Sensor 1
      - Air-Fuel Ratio (A/F) Sensor Bank 2 Sensor 1 harness is open or shorted
      - Air-Fuel Ratio (A/F) Sensor Bank 2 Sensor 1 circuit poor electrical connection
      - Faulty Engine Control Module (ECM)

      Check and repair (as required) the oxygen sensor connections, replace the oxygen sensors. The parts are readily available from these many on-line sources, www.partsgeek.com, www.rockauto.com, www.discountautoparts.com, www.autopartswarehouse.com, www.jcwhitney.com - to list only a few possibilities. The various O2 sensors are listed in price from around $32.00 each.

      Please note: this same question was already answered on May 20, 2014.
  • AutoMD Member
    AutoMD Member - 2009 Toyota Corolla - Engine - 5/20/2014
    My car makes noise when I am trying to accelerate and it reaches 3200-3400 RPM.
    Mileage - 53k Noise comes when I am pressing hard on the gas pedal to accelerate after a stop. It comes especially at 3200-3400 rpm
     
    0 answer
  • AutoMD Member
    AutoMD Member - 2009 Toyota Corolla - Engine - 5/20/2014
    My car makes noise when I am trying to accelerate and it reaches 3200-3400 RPM.
    Mileage - 53k Noise comes when I am pressing hard on the gas pedal to accelerate after a stop. It comes especially at 3200-3400 rpm
     
    0 answer
  • 64
    64 - 2002 Toyota Camry - Engine - 5/20/2014
    Code p1155 2002 Toyota camry v6 engine can someone help me with this.thank you
    my car has 80000 miles check engine light is on got the code and it says p1155 .my car is a 2002 Toyota camry v6 engine
     
    • Jimm
      5/20/2014 Jimm
      P1155 = Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 2 Sensor 1

      The bank 2 is rearmost (next to the firewall) set of three (3) cylinders on the transverse-mounted V6 engine. The sensor 1 location would be the O2 oxygen sensor located ahead (upstream) of the catalytic converter.
      - Faulty Air-Fuel Ratio (A/F) Sensor Bank 2 Sensor 1
      - Air-Fuel Ratio (A/F) Sensor Bank 2 Sensor 1 harness is open or shorted
      - Air-Fuel Ratio (A/F) Sensor Bank 2 Sensor 1 circuit poor electrical connection
      - Faulty Engine Control Module (ECM)

      Check and repair (as required) the oxygen sensor connections, replace the oxygen sensors. The parts are readily available from these many on-line sources, www.partsgeek.com, www.rockauto.com, www.discountautoparts.com, www.autopartswarehouse.com, www.jcwhitney.com - to list only a few possibilities. The various O2 sensors are listed in price from around $32.00 each
      Jimm
      5/20/2014 64
      thank jimm just came from auto zone they says my code is p1155 definition air/ fuel sensor heater circuit bank 1 sensor 2 is this the same as the above answer you gave me.thanks again for your help
  • AutoMD Member
    AutoMD Member - 2004 Toyota Corolla - Engine - 5/19/2014
    Why did my 2004 Corolla suddenly drop from 30 MPG to 21 MPG?
    Recent issues: 143k miles: CEL came on with car vibrating especially while idling. Diag code suggested that an ignition coil was misfiring. Replaced ignition coil, which did not fix the problem. Mechanic replaced spark plugs, which did appear to fix it. Oil was ...
     
    • GT500Knights
      5/19/2014 GT500Knights
      How is the vehicles performance compared to how it previously ran? Any significant difference now in idle, acceleration, and such? Search for any vacuum leaks. Check for any pending codes as well. Check fuel pressure with engine off and ensure it does not drop (with fuel return line pinched). Check ect sensor operation. If you have a scanner to read live data, observe ect and IAT sensors after the car has been sitting for at least 6 hours. Their temperature readings should be within 5 deg F of each other. If not then measure their resistances and compare it to a chart. Check oxygen sensor operation, and ensure you also do not have any exhaust leaks. If you need me to provide you any diagnostic charts and info, let me know.
  • AutoMD Member
    AutoMD Member - 2004 Toyota Corolla - Engine - 5/19/2014
    Why did my 2004 Corolla MPG suddenly drop about 35%?
    Recent issues: 143k miles: CEL came on with car vibrating especially while idling. Diag code suggested that an ignition coil was misfiring. Replaced ignition coil, which did not fix the problem. Mechanic replaced spark plugs, which did appear to fix it. Oil was ...
     
    0 answer
  • AutoMD Member
    AutoMD Member - 2012 Toyota Prius - Engine - 5/17/2014
    While I was driving my car fuel end. Now after putting 20 Ltr Fuel its start but does not move
    its 100000/ km driven I have already tried disconnecting n reconnecting rear Battery Wires. Its starting on Battery but Engine is not Starting
     
    0 answer
  • AutoMD Member
    AutoMD Member - 2009 Toyota Yaris - Engine - 5/15/2014
    Squealing noise from under the hood
    It squeals a bit when I first crank up the car and then quickly stops. But starts up again in a greater degree once I turn on the heat or a/c. The serpentine belt has just been recently professionally replaced because I thought that was the source of the noise. ...
     
    • Chevy doctor
      5/15/2014 Chevy doctor
      Check the belt tensioner. If it has weak pressure than it will cause the belt to make a squealing noise. When your compressor clutch is engaged, there us more stress on belt so noise would get louder. Try a new tensioner.
  • sherral_b
    sherral_b - 2008 Toyota Corolla - Engine - 5/13/2014
    How much should it cost to repair a small leak in the gas line?
    The quote I received sounds extreme and I am a single women and do not know a lot about car repair.
     
    • sanfordwilmer
      5/14/2013 sanfordwilmer
      Since its a leak in the 'gas' line, you should not try mending it. Instead you got to replace it asap. It may be a problem to do it yourself, but you can give it a try by using automotix.net/autorepair/diy/2008-toyota-corolla-repair.html. This includes repairing and maintenance techniques specially for you car. It should come in handy to you since you mentioned about being a single woman.
    • AutoMD Member
      5/13/2014 AutoMD Member
      I don’t know the exact repair cost but it can cost you around $50. Though my first suggestion would be, you should replace the gas line with new one. But if it is out of your budget you can go for used one too. It will cost you a lot less and it’ll save you from any sudden gas-leak crisis too. Recently I bought a nice wheel cover for my Toyota corolla from http://www.iautobodyparts.com./ It’s a nice place where you can get your stuff also.
  • AutoMD Member
    AutoMD Member - 1992 Toyota Corolla - Engine - 5/9/2014
    The car was not starting..
    so i change sparks plugs and the car start up fine. one week later it doing it again. could it be the wire or the coil.
     
    • GT500Knights
      5/9/2014 GT500Knights
      First things first pull any codes that might be stored to give an idea of what the problem might be.

      What symptoms is the car having? Is the starter motor engaging and turning over?

      The coil and the wires could be the issue, along with a plethora of other problems.

      Map sensor, mad sensor, vacuum leak, air filter clogged, fuel injectors clogged, egr valve stuck open, fuel filter clogged, fuel system (relay, pump, lines, regulator) not functioning....possibly even no gas in the tank. Battery could be discharged and the timing belt could also have snapped. Try to be descriptive. Tell us how the car sounds when it is trying to start. It should be a smooth and steady rhythm.
  • nacho
    nacho - 1996 Toyota Avalon - Engine - 5/8/2014
    Codes p300, p302, p304 and p306, why i keep getting this codes?
    i was getting this codes before, they suggested me to replace the upstream oxygen sensors and i did, I ALSO REPLACED THE SPARK PLUGS AND WIRES, I REPLACED THE COIL PACKS LIKE A MONTH AGO, 3 DAYS AGO I GOT CHECK ENGINE LIGHT ON AGAIN I SCANNED IT AND GOT SAME CODES ...
     
    • GT500Knights
      5/8/2014 GT500Knights
      Check mass air flow meter. Check fuel pressure for that side of the engine. The codes you have are all on one side of the engine. Check camshaft position sensor for proper operation on the even-numbered cylinders. The problem area isn't just related to a single cylinder or multiple cylinder, just that bank. When was last time timing belt was replaced? They're known to jump teeth. Camshaft timing for that bank could be off a little.
  • AutoMD Member
    AutoMD Member - 1999 Toyota Avalon - Engine - 5/8/2014
    Intermittent jerking of engine and stalls when in idle unless gas is applied
    after 100 to 150 miles, car starts jerking, rpm goes up and down with the jerk. i apply gas to keep it going. when in idle it will stall unless gas pedal pushed. it will quit doing it if i stop the car for 5 minutes and restart. is getting worse. it will mess up ...
     
    • GT500Knights
      5/8/2014 GT500Knights
      O2 sensor (s) may be bad. Check for proper operation and they have fast and not lazy response time. Idle air control valve may be faulty, check for functionality and make sure port, as well as throttle body is clean. Check throttle position sensor. If it is not sending the correct voltage back to the PCM, the PCM will not properly adjust the idle fuel-air mixture. Check for any vacuum leaks. A good way to do this is to take about a 2 foot piece of vacuum tubing, hold one end to your ear, and move the other end around the engine, around any hoses or areas susceptible to vacuum leaks. If there is a vacuum leak after the mad sensor , it will trip out the PCM. Catalytic converter may be plugged. Excessive exhaust back pressure will build up. Remember, what goes in must go out. Connect a vacuum gauge. Normal vacuum should be between 17-22 inches during idle. If you increase the Rpms, then let go of the throttle, vacuum should drop below 5 inches, then return to normal range. If you hold the Rpms steady at around 2000, vacuum will initially drop, then should return to around 17-20 inches (while still holding rpm at 2000. If vacuum steadily drops while hold rpm steady, catalytic converter (or muffler) is creating back pressure.