Question about 1999 Toyota Sienna

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Obd2 port not working 1999 toyota sienna

Check engine light on, starts flashing, engine starts misfiring, then stops misfiring, runs good, engine check light goes off, obd2 port not working, fuses good.

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Run for 3-4minutes thn turn off n disconnect nevative battary lead 4 5minutes thn connect nevative battery lead n try tht 50-50

Posted on Apr 02, 2014

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Obd2 has a fuse need to replace it if the fuse is ok you have a bad ecu dianostic part of computer could be bad

Posted on Jun 26, 2015

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Posted on Jan 02, 2017

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SOURCE: When 1999 Toyota sienna xle check engine light is

If the light was flashing when it came on, then it means your engine is misfiring.

A solid light can mean anything from a loose/faulty gas cap to a transmission issue.

This light comes on when the computer detects a fault of some sort in its diagnostic tests. If it keeps detecting this issue, the light will remain on. If the light turns off, then it has detected that the issue may no longer be present.

In order to find out what the exact reason was for your light, You need to have your car computer scanned to retrieve the code that the computer would have stored when the light triggered. Most garages will do this free of charge. The code will tell you what may have caused the light to initially turn on.

Posted on Oct 05, 2009

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SOURCE: Check engine light came on. OBD2 gave me 5

Take it to autozone. If you live in USA. They have a thing that checks and they will tell you exactly what the codes mean.

Posted on Sep 04, 2009

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SOURCE: 1999 toyota camry

Take it to autozone and have them to pull a code on it.It sounds like O-2 sincer

Posted on Dec 07, 2008

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SOURCE: toyota sienna interior lights not working

The problem is in the sunvisor light. You will have to take the light assembly off and you will find wires have become disconnected.

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Posted on Jan 29, 2010

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SOURCE: Turn signals and hazard flasher stopped working in

Yes, you are on the right track. More than likely it is a defective flasher relay as one relay controls turn signal and hazard flash. The flasher relay is located behind the left side of the instrument panel.

Posted on May 01, 2010

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2013 Sienna starts and dies. No fault codes. If I give it more then 50% throttle and play with it It will stay running. Anything less and it dies. Starts up normal but dies almost immediately. No Antitheft...


no fault code where? on the Pro OBD2 scan tool screen>?
should be in warranty, why not let them fix it?
tow it there.?

bravo that, first post ever with fast right foot test, you are on the ball.
ok, that means this.
1: it's not losing 12vdc power to run the EFI. all lamps are not dim.
2: the fast foot test, implies to me, spark is ok, (unless one cylinder shut down, a bad COP?. but the scanner will see that for sure and did not. Gross misfire, is never unreported by the scan tool. (PCM)
gross enough to stall the engine.
so fueling issues.
id check for flooding or starving for fuel. and bad fuel.

Ok so my guess, is its losing fuel pressure or you got bad fuel.

Feb 16, 2014 | Toyota Sienna Cars & Trucks

1 Answer

What is the drive cycle for a 1999 Toyota Sienna minivan?


You must clear the light and then do the drive cycle.

Jun 14, 2013 | Cars & Trucks

1 Answer

Oil pressure warning light does not lights.car running good.toyota sienna 1999 3.0 engine 6 cylinders


the light only comes on when the oil is low. to test it, next time you service it start the engine with a few quarts oil missing. it is safe for a short time, check the light

Apr 12, 2013 | 1995 Isuzu Trooper

1 Answer

Have a 2008 toyota sienna and the check engine light is on. It said o2 sensor I replaced and still check engine light is on.


Codes DON'T tell you what to replace

Study OBD2 Systems

You just had a sensor reporting an out
of range condition

You then have to diagnose the reason

Have a professional take over

Mar 13, 2011 | 2008 Toyota Sienna

1 Answer

I have a 1998 toyota sienna with 132,000 miles on it. Recently I noticed a "shuddering" or hesitation while driving that was intermittent at idle and driving. The check engine light came on...


my name is Jerry Tiet. Base on my experience on 1998 Toyota Sienna with the DTC P0303 show there is a misfire in cylinder #3. a possible cause is the ignition coil of the #3 cylinder. Compare the resistance value of the ignition coil of cylinder #3 with the other coil or simply switch ignition coil #3 with one of the other ignition coil and clear the DTC with the scan tool. Then run engine for couple days. If the check engine light on again. Let me know what is the DTC code.

Nov 11, 2010 | 1998 Toyota Sienna

1 Answer

2006 Toyota Sienna just got Check engine/servie Light at 67000 miles. Is this a regularly scheduled service light?


Verify that check light engine if you have to connect a scanner OBD2 code for you and you can determine which is the sensor that has problems

Jun 22, 2010 | 2006 Toyota Sienna

2 Answers

After running 70-75 mph for for 2-3 min service engine light starts flashing but goes right back off when speed is reduced to under 60-65 mph


a flashing check engine light means a misfire, you should go to one of your local parts stores and have them read your code. your code will tell you which cylinder was misfiring and if there are any other codes that may also be related to your problem. but it could need anything from a fuel filter to a catalytic conveter or just a tune-up, getting those codes could greatly narrow it down

Nov 27, 2009 | 2001 Chevrolet Silverado 2500HD

1 Answer

When 1999 Toyota sienna xle check engine light is on?


If the light was flashing when it came on, then it means your engine is misfiring.

A solid light can mean anything from a loose/faulty gas cap to a transmission issue.

This light comes on when the computer detects a fault of some sort in its diagnostic tests. If it keeps detecting this issue, the light will remain on. If the light turns off, then it has detected that the issue may no longer be present.

In order to find out what the exact reason was for your light, You need to have your car computer scanned to retrieve the code that the computer would have stored when the light triggered. Most garages will do this free of charge. The code will tell you what may have caused the light to initially turn on.

Oct 05, 2009 | 1999 Toyota Sienna

1 Answer

1995 Toyota Previa Engine Sputter after prolonged drives


95 toyota may have an early obd2 diagnostics,which started for all cars in 96,which means it can track a cylinder misfire,when ck light flashes it can mean multiple misfire detected causing serious loss of power,you can try going to autozone they do free ck engine light code reading ,tell them you may have obd2 plug according to web,let me know codes if you get lucky.with AZ its hit or miss

May 06, 2009 | 1995 Toyota Previa

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