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The mkiv Supra Owners Club

Check engine light code 89


davec
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Hi, Just wondering if any one can give me some insight to a problem I’m having with regards to a check engine code 89.

Car is a facelift VVTLI factory twin turbo 6 speed manual. I have owned the car a number of years with no problems apart from one little niggle. When the car was warmed up and it was shut off for say 15 minutes to 1 hour and it was started it would hesitate to idle until you gave it some throttle for maybe 5 seconds and then would be fine, outside of that window it would idle perfect.

Drivability was always perfect no problems until last month I was on a trip when the car went into limp mode and gave the check engine light showing code 89. I was able to pull in on off the road so i disconnected the battery for 30 minutes and started it and the car drove fine for the rest of the trip with no problems and has driven fine on a few weekends spins out until today, I went down the road and same thing happened back again.

With the the check engine light on the car will idle slightly higher say about 1000 but won’t rev stationary at all until you drive. When you go to move on you have to put your foot fully down on the throttle and it will pick up slowly, it will drive along at a reasonable rate so long as you keep the throttle nearly fully open but the minute you lift your foot it will jerk like you cut all the power until you put your foot fully back down.

I have gone to toyota and the guys there are unsure where to start and have spoke to a few mechanics who are equally unsure and with parts on the higher end its hard to start just randomly swap things out. If anyone has had a similar experience I would be so grateful for your input

 

Thanks

Dave

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You could try a throttle body reset "Try reset the ETCS-i system – Turn the key to the “ON” position but don’t turn over the car, put your foot completely down on the throttle “Gas” pedal for 30 seconds, you should hear a beeping/humming sound while the ETCS-i system resets, turn the ignition to “Off”. Now turn the car back over and re-test to see if you have any symptoms"

 

Some more general VVTi throttle info 

 

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Hi, thank you for the reply. I will certainly try that tomorrow and bring it for a drive and see how it goes. 

I will keep this topic updated if I do find a solution just incase someone else happens to have a similar fault. 

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Hi

I had this couple years ago

I had to replace the throttle body with I managed to find used

I have kept the old one incase anything is found to repair resolve this

Something to do with the drive by wire maybe the electric motor that drives it

There use to be a kit that replaced it but I can't seem to find it anymore

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