Having problems with your 2003 Toyota Highlander ?

Check engine light came on - 2003 Toyota Highlander

Posted / edited by AnonymousUser on : 15-01-2018

Answers :

This is usually triggered by an emissions problem detected by the cars computer, but can be something else. You need to check what engine codes are stored in the cars computer to figure out what is wrong. Although the Toyota may run fine, continuing to drive it w/out fixing the problem could result in other problems, so have it checked soon. Most parts stores offer free check engine light code retrieval. They will plug a hand held scan tool into the cars diagnostic port, and 'read' any codes stored on the cars computer. They will tell you the code #(s), and suggest ways to fix the problem. If you have further questions at that time, post them and the code #'s at this site. Good luck
Repair Help & Product Troubleshooting for 2003 Toyota Highlander

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My check engine light came on the day after I had my car smog checked. My Tech noted error codes po136, po174, po303 and po305, It's a 2002 Highlander with only13,660 miles on it. Toyota had it for a week and couldn't resolve the problem. They reset the check engine light and told me to keep driving it. The light came back on after 7 days. Any suggestions?


The po303 and p0305 codes are indicating a cylinder 3 & 5 MISFIRE respectively. the other codes are for o2 sensor and fuel trim. the misfire codes should be fixed first and then worry about the others if they still exist. if the vehicle has direc ... 2002 Toyota Highlander

Check engine light came on 2002 Toyota Highlander and didn't sound like car went into overdrive, engine got louder when going over 35-40 mph. Also friend sprayed gunk on engine a couple of days ago and cleaned engine with water. Took to mechanic and code was showing knock sensor. What do you recommend?


... 2002 Toyota Highlander

My check engine light just came on. The diagnostics say that I need a P0155 sensor. I have a 2003 Toyota Highlander with a 3.0 engine.


P0155 indicates the heated O2 sensor is malfunctioning-If \015\012 your oxygen sensor has 4 wires on it, it only means it \015\012 has a heater circuit on it and it is used by the sensor \015\012 ... Toyota Highlander

Check engine and svc light came on Toyota Highlander 2002


Check vacuum hose has come loose or gone bad from back of air filter box? ... 2002 Toyota Highlander

I have a 2005 Automatic Toyota Corolla. In late December 2009, the check engine light came on with error code PO741. I took it to the Toyota dealership and they replaced the Engine Control Module and sent me on my way. Less than one month later, January 2010, the check engine came on again with the same error code. I took it back to the same Toyota dealership, where the tech insisted the transmission had the wrong transmission fluid (Dextron fluid instead of Type T4). This is complete b


... 2005 Toyota Corolla

I have a 2002 Toyota Tacoma with 65,000 and check engine light came on. Had platinum plugs put in at 35,000. Vehicle runs fine but check engine light is or so disconnected negative battery terminal for a minute then reconnected and light is off. Will it come back on and why did it come on in the first place as I change oil regularily so it is in good shape. Is check engine light just for dealers to make money or does it really have a purpose? Truck runs fine but light is out now since I disconne


It has a purpose, but the problem isn't always a big deal. \015\012Please see my tip at http://www.fixya.com/cars/r5932051-check_engine_light_ ... 2002 Toyota Tacoma

I have a 2002 Highlander and the check engine light just came on. The last 2 times it was the gas cap was not secured properly. I checked this time to make sure it is on tight. I won't be able to get to the dealer to have this checked out until next week. Is it okay to continue to drive the vehicle until week with the check engine light on ? Does the check engine light on mean anything dangerous and needs to be taken care of immediately


That depends. Usually a check engine light is an indication that something is amiss with one of the sensors in your vehicle. The computer can compensate to some degree for sensor malfunction and sensor drift. Most vehicles have two lights, a check en ... 2002 Toyota Highlander

Check engine! 2002 Toyota Camry- Auto Zone gave me a code P0420. What does that mean? Do i need to replace the oxygen sensor or the catalytic converter Check engine light came on. Using my scanner it reported code P0420. I reset the Check engine light. Is this okay to do? If something really is wrong and this was just a one time error will the light come back on if it happens again? I checked and the gas cap was loose.


Information about the p0420 codehttp://www.obd-codes.com/p0420 ... 2002 Toyota Camry

I have a 2009 toyota rav4, and the check engine light came on. i plug the computer in and it indicated camshaft. after driving a while and turned the car off the check engine light never came back on again. I have a feeling it was the camshaft sensor, since the light has gone off on it own, should i still change the sensor?


NO I WOULD NOT. IT WAS JUST A COINCIDENCE THAT THE LIGHT CAME ON. SOMETHING MUST HAVE JUST TRIGGERED THE LIGHT TO COME ON. IF THE LIGHT DOES COME BACK ONLY THEN WOULD YOU CHANGE THE SENSOR UNTIL THEN JUST KEEP DRIVING THE VEHICLE. ... 2009 Toyota RAV4

I have a 2002 toyota celica gts, and just recently the check engine light came on. I had my friend read the code, and it came up as 301, misfire in cylinder 1. To try and diagnose the problem, I switched coil #1, with coil #4 to see if the problem follows. About a week later, the light comes on again, the same error code 301. The next step I took was to replace the spark plugs, my car has 81k miles on it at this time. And yet again, a few days later the check engine light comes on again. N


Rotate the wires swap #1 with the "bad" one if you can, before you spend money on a new set of wires. This problem usually is caused by: either a broken sparkplug carbon wire coreor, a mis-alined reluctor. ... 2002 Toyota Celica

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If its the same code it should be fairly easy to see if the EGR valve is functioning correctly. Its vacuum operated so with the engine running you can apply vacuum to the solenoid and expect the engine to run extremely bad if not stall. If it does th ... 1997 Toyota RAV4

Check engine light came on - 2003 Toyota Highlander


This is usually triggered by an emissions problem detected by the cars computer, but can be something else. You need to check what engine codes are stored in the cars computer to figure out what is wrong. Although the Toyota may run fine, continuin ... 2003 Toyota Highlander

I have a 2002 Toyota Highlander, the check engine light came on, I took it to AutoZone and they hooked it up to the machine. It states that it says it is a air heat seansor. What is this and how can I find out what the part is. The dealer wants $100 just to look at it


Can you get me some specific code numbers? ... 2002 Toyota Highlander

Hi, I have a 1998 2.2 Toyota Camry LE. The Check engine light came on, and the speedometer & odometer stop working. The tachmoter and all other dash are all working fine, temp, fuel gague. I disconnected the negative battery terminal, reconnected it; the check engine light went off, and came on again right away this morning after driving a very short distance. Any suggestions. Is this a major repair? Thanks


First if you have a trouble code disconecting your battery negative cable it wiil not fix the problem it only turns the brain off (computer) but the problem still ther, go to autozone to get your trouble codes, one of the problems you have could be y ... Toyota Camry

Hi, i have toyota corolla 2005 and one day i was driving it and a check engine light came on. also the car was pulling (feels like transmission) under 30mph.beyond that, the car acted normally. later on the car was driving fine and the check engine light came off. after 4 days the same problem accured. please help me!!!!!


This is a common problem with the ECU which is a rcall item on 2005 Corollas. If you take your Corolla to the dealer they will let you know if your vehicle is on the recall list and replace it free if it is. ... 2005 Toyota Corolla

Check engine and vsc light both came on my toyota highlander 2001 ...neeed to pass inspection in nyc. what can i do?


You have to first check what it is, most shops charge about 30$ for it.. they will tell you exactly what it is, then depending on that it will be know what's nessesary to fix for inspection.. you can also try to reset the computer by disconecting the ... 2002 Toyota Highlander

I have a 1994 Toyota corolla, my car was vibrating real rough for the first 20 to 30 minutes after i started it so i thought distributor cap checked that rotor was bad and cap was dirty so i changed them couple days later check engine light came on couple days after that car would sputter and check engine light would either come on or go off. then a week later car died going 65 mph on the interstate fired right back up about 15 min later it did it again at a stop light same thing fired right bac


... 1994 Toyota Corolla

My son just paid $4300 for a complete engine rebuild on his 2004 Toyota RAV4. The "Check Engine" light kept coming on and at first it was determined that he had a computer problem. So the shop technitians reloaded the software into the computer and this solved the problem temporarily. When the light came back on they said that the head gasket needed to be replaced. Now after all this work and expense the "Check Engine" light continues to come on. He's totally disgusted and running out of op


Go back to the guy that rebuilt it and tell him your problem ... 2004 Toyota RAV4

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Yes common problem on these vehicles is mass air flow meters , simple fix is to remove sensor and clean it with throttle body cleaner . This always works for me as the sensor gets wrapped in residue and send wrong data to computer. This is the same s ... 2003 Toyota ECHO

Vcs and trac off light as well as check engine light coming on on my 2004 Toyota Highlander


... 2004 Toyota Highlander

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Try check the ground wire from body to engine.. n there r some earth/ground wire attached to engine somewhere along the engine head or block, wire hardness possible causing this kinna problem too.. try pull/ push the wire hardness that goes around th ... Toyota Camry

I have a toyota rav4 2003 management light came on checked code p1155 oxygen sensor bank1 sensor 2 changed it, cleared code light still,came on again ,changed the other three ,cleared the code again, ran engine light still comes on checked code still shows p1155 ,have you any ideas thanks


The upper sensors are air fuel sensors and the lower ones are o2 sensors. you cant mix these up. Assuming you did everything right and still coding then either the new sensor b1s2 is bad or the wirng(power and ground need to be checked. A scan tool c ... 2002 Toyota Avalon

I live in chicago. Exactly a week ago I ran my toyota prius without warming it up. after about 20 minutes the check engine light came on. later i checked the fluids, oil & coolant. I did have to add some coolant to the resevior and the radiator. i used peak coolant, but mixed it with water before i put it in. the check engine light remained on. I consulted my 2003 prius repair manuel. i disconnected the small battery in the trunk, negative terminal 1st, and then reconnected it, opposite of how i


First you can disconnect again the battery from car terminals, waiting for 30 minutes and reconnect, in order to reset the ABS electronic control unit (ECU) and turn off the ABS light. \015\012If this does not work you should know that the ABS ... 2003 Toyota Prius

Vcs light Hi- i have a camary 2007 and my vcs light came on and the check engine light and the skid tired came on all at once. Do you know the reason for that? The last time I took my car to toyota was in Oct. 2011 because the vcs light came on and got my coils fix. Do I need new coils again? please help


... 2007 Toyota Camry

I have 2001 Toyota Highlander w/v6 4.0 litre engine Start the car and no trouble lights come on.Put it in gear and drive approximately 15 seconds the VSC light on dash come on.No check engine light or ABS light comes on.I bought an Actron Diagnostic computer that does OBD 2&3.I have also replaced both O2 sensors on the engine but not the catalytic converter.Actron said it was in normal range through veried rpm ranges.Please help with any suggestion


... 2001 Toyota Highlander
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