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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 04-10-2011
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Join Date: Apr 2007
Location: torrington ct
Posts: 156
throwing o2 codes

hi guys so i bought sct software and have been folling around with it. bought everything from lasota racing, don provided a base tune to get me going so i loaded it yesterday and it ran fine the first time out when i started the truck for the sdecond time the cel came on showing p0141 Heater Circuit Malfunction (Bank 1, Sensor 2)
and a p1000 saying the monitors arent ready yet
then today after about 70 miles of driving another code showed up a p0136
O2 Sensor Circuit Low Voltage (Bank 1, Sensor 2)
and i have a shake at idle ( to be expected) now is this just a 02 sensor that is bad or is this a vaccume leak? i know these motors are know for vaccume leaks but i have done all intake gaskets and that solved my 02 probles before( cant rember which bank/sensor it was)
the truck is a 97 4.0l auto with 156k on it i bought the truck with 125k on it and have never changed the 02 sensors. and yes i have cleared the KAM each time i tuned the truck
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