Toyota 8FGCU30:
FAULT CODE 01-3

Fund fault code 01-3.Customer already had another tech. Who changed the throttle position sensor. I cheched the spark plugs and found them worn.I replaced them and was able to get the engine started. I switched the oxygen sensor and the engine started better and ran well for an hour then it started to run rough again.The code is still present. Does anyone have any ideas on my next move. Is there a way to clear this code. The truck has a 4y engine. Truck serial #c2783
  • Posted 1 Aug 2024 05:58
  • Discussion started by RAIN
  • Ontario, Canada
RAIN
Showing items 1 - 5 of 5 results.
You're going to need a new mixer, and maybe more and then if you're in Canada you should have a filter available for the lp hose so you can avoid this from happening.your mixer is contaminated and bad I have 1 available if you need it however you may need new o2 sensors as well that code is a mystery right now
  • Posted 26 Nov 2024 01:36
  • Reply by Nc305
  • Florida, United States
Thank you for the information.
  • Posted 4 Aug 2024 23:59
  • Reply by RAIN
  • Ontario, Canada
RAIN
Lots of possibilities...1 connector contact defect
2 intake system defect 3 exhaust system defect 4 sensor defect 5 ignition defect 6 fuel system defect 7 harness defect 8 engine controller defect
Good luck...I would swap from a know good truck..if not available then start cheap with ignition switch...Then call a Toyota tech in your area..look for burnt or loose wire...and try reconnecting all harness connections checking for loose or unseated pins
  • Posted 4 Aug 2024 11:59
  • Reply by Matthew_Reed
  • New York, United States
thanks for your reply, I tried disconnecting the negative terminal but the code came back immediately.i tried doing the driveability test- depressing the gas pedal for 5 mins. then let idle for 2 mins. and then repeat this three times. During this test 01-4 came up and now i have both codes coming up.
  • Posted 4 Aug 2024 06:15
  • Reply by RAIN
  • Ontario, Canada
RAIN
First try disconnecting negative from battery for 30 seconds...if that doesn't clear it...go to the engine module plug with grey cover just below battery and jump out...I'll get back to you try the ground thing first
  • Posted 3 Aug 2024 14:31
  • Reply by Matthew_Reed
  • New York, United States

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