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Toyota Tacoma Diagnostic Codes and Warning Lights

18 messages,  Last post on Nov 19, 2009 at 7:54 PM

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What is this discussion about? Toyota Tacoma, Fuel System, Auto Repair, Engine, Exhaust, Truck

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#9 of 18 Check Engine Light by klodge Aug 29, 2008 (7:17 am)
My 2000 Toyota Tacoma (4 cylinder) seems to run perfectly, but the Check Engine lamp illuminated about 2 days ago.   I have followed diagnostic instructions carefully and I am perplexed at the results. The diagnostic instructions from a Toyota website that I am following are:                "...Later models, '87 and newer use a multiple terminal "DIAGNOSTIC" connector which is a small, rectangular-shaped gray "box", usually located near the right fender in the engine compartment. To get codes out of this type of connector, jump the "TE1" and "E1" terminals. Finding these terminals is easy as the inside cover of the diagnostic connector contains a schematic of the connector pinouts..."   When I insert the jumper (paper clip) between TE1 and E1 then turn the ignition key to ON, the Check Engine light illuminates and stays constantly illuminated (e.g. the check engine lamp doesn't change intensity). I have waited over 3 minutes and there are no changes.   I have also disconnected and reconnected the jumper with the ignition switch remaining in the ON position. The results were exactly the same.   I have reset the ECU by disconnecting the battery and the check engine lamps stays out for about 15 minutes of driving, but then comes on again.   Does a steady Check Engine light have any meaning?   Can you provide any insight into what the problem might be?   Ken Lodge
#10 of 18 Electrical problems 03 tacoma by toyotataco03 Feb 02, 2009 (3:20 pm)
Everytime i press the brakes my right turn signal lights up but does not flash, the signal works normally when the brakes are not pressed
#11 of 18 Re: Toyota Tacoma Maint. Required Light [pandesal] by LeoRivera Feb 09, 2009 (6:53 pm)
Replying to: pandesal (Mar 23, 2008 9:41 am) to get rid of the maintenance light- put the key in the ignition and turn it to the on(all the warning lights turn on but dont start the engine) position, click the button by the odometer until the mileage of your truck comes on. hold down the push button and turn the key to the off position, still holding the button, wait about 10 secs, keep holding the button, turn the key to the on position(all the warning lights turn on but dont start the engine) you will see 4 or 5 dashes on the odometer, wait till they dissappear. thats it, release the button. Replies to this message: vu90g (Mar 01, 2009 12:56 pm)
#12 of 18 Re: Toyota Tacoma Maint. Required Light [LeoRivera] by vu90g Mar 01, 2009 (12:56 pm)
Replying to: LeoRivera (Feb 09, 2009 6:53 pm) Thanks Leo! Worked like a charm.
#13 of 18 maint light code by tberton Apr 10, 2009 (5:45 pm)
I have a 2006 tacoma and when I start the engine the maint light comes on and blinks six times, then it goes off. I don't have to crank the engine I can just turn the key to the start position. Truck runs great, have 40,235 miles. Also can you check the codes but turning them on with the truck functions. Like turning the key when you cancel the oil lihgt.
#14 of 18 code p2238 on an obd2 by toyotaco04 May 16, 2009 (2:12 pm)
#15 of 18 code p2238 on an obd2 by toyotaco04 May 16, 2009 (2:12 pm)
i kno its an o2 sensor if i dnt change it can it harm anyhting in my vehicle and when the obd2 pulled it up this is what it read "p2238 02 bank1sensor1 positive current circuit low " plz give me some info and any idea how much a sensor is and is it hard to replace and also where is it located? thanks alot
#16 of 18 99 Tacoma 4x4 Check engine light by bdn1 Sep 27, 2009 (3:42 am)
I have had this annoying check engine light that will not go away. I recently changed both the up stream, and down stream O2 sensors. When the engine had to be re-built I added a NWOR Header, Volant cold air intake, and JBA cat back exhaust. I also changed out the cat at the time of the re-build due to the engine over heating a floating the head gasket, and seizing the rings. The truck runs great, I average about 24 mpg on the highway, and have no other problems. When the computer is scanned it come back with a catalyst code. Any ideas out there on a possible fix for this?
#17 of 18 Check engine light by jcsouza Oct 07, 2009 (10:00 am)
2001 Tacoma's Check Engine Light came on right before I took it for the state inspection. My mechanic was good enough to give me the code printout that reported "System Too Lean" and "Air/Fuel Ratio Sensor Circuit range" They suggested the thermostat which I cahnged with no effect. I'm now way out of date for inspection and need to renew my registration, guess I need an answer.
#18 of 18 2002 Tacoma code by mmasood Nov 19, 2009 (7:54 pm)
On my 2002 Tacoma twin cab, I have code P0442. Somewhere there is a leak in my evaporative syst. How do I find the leak?

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