LIMP MODE PROBLEM SOLVED - I THINK

[bronsin]

Yes my problem was the MAF sensor. Do you get YouTube? There’s a mechanic named Scotty on YouTube who has all kinds of videos about car problems. You might search your area codes on YouTube for suggestions.

[Martin Bruce]

Originally Posted by bronsin

Yes my problem was the MAF sensor. Do you get YouTube? There’s a mechanic named Scotty on YouTube who has all kinds of videos about car problems. You might search your area codes on YouTube for suggestions.

Bronsin, I have just cleaned the MAF Sensor, and the PCV Valve, and now replaced the Battery. It seems to run a lot better now, been alright for a few days now, inlcuding a longer trip out of Town. After Battery disconnect, ECM has to relearn ideal settings.

Yes, I have seen some of Scotty's vids on YouTube - he is quiet useful.

[Martin Bruce]

Originally Posted by bronsin

Yes my problem was the MAF sensor. Do you get YouTube? There’s a mechanic named Scotty on YouTube who has all kinds of videos about car problems. You might search your area codes on YouTube for suggestions.

Bronsin, with the cold weather here now (-1C) my Yaris has been going into Limp Mode daily and driving me crazy - that is until I tried Scotty Kilmer's YouTube Toyota ECU Reset Fix. It may have finally cured the problem!

https://www.youtube.com/watch?v=F6pMlbNW7-E

Basically: (With Key Off)

1. Disconnect BOTH Battery cables , starting with Negative.

2. Short the + and (-) cables together using a wire and croc clips for a few minutes

3. Put the sidelight switch on to drain any remaining charge in the ECU

4. Turn lights off, reconnect Battery cables, starting with positive, and leave for a few minutes.

5. Start Engine and idle at 2,000 revs with things turned on as you would normally drive , i.e A/C or sidelights etc. for a few minutes (Scotty says 5 min, I did 3 min)

6. Allow idle to drop to normal, then idle again at 2,000 rpm again for a few minutes with no load on (from lights, A/C).

While the Battery was off, I also unplugged the sockets to the ECU (after a few minutes) and sprayed the plugs with WD40 , then reconnected them. (This was an awkward job in itself, but I won't go into details here). I thought I might have a bad connection or corrosion as the fault codes always said 'Powertrain...'

Anyway, Yaris is running good now and I have along trip ahead this Sun, thanks

Can't believe Car Makers allow their products to be this tempermental!