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OneSicSRT

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Everything posted by OneSicSRT

  1. P0125 Insufficient Coolant Temp. for Closed Loop Fuel Control. I've read a lot of forums about people saying this is a coolant temp sensor or thermostat, but TIS (Toyota Information System) says that is has to do with an A/F (air/fuel ratio) sensor. Here is the condition and trouble area directly from TIS. (I've worked for Toyota and Lexus for a few years and have access to to TIS); DTC Detecting Condition; P0125 After the engine is warmed up, A/F sensor output* does not change when conditions (a), (, and © continue for at least 1.5 min. *: The output value changes at the inside of the ECM only. (a) Engine speed: 1,500 rpm or more ( Vehicle speed: 40 ∼ 100 km/h (25 ∼ 62 mph) © Throttle valve does not fully close Trouble Area; Open or short in A/F sensor circuit (bank 1, 2 sensor 1) A/F sensor (bank 1, 2 sensor 1) ECM DTC P1155 A/F Sensor Heater Circuit Malfunction (Bank 2 Sensor 1) (the front of the motor, upstream sensor) If you open the hood and look straight down at the exhaust manifold, that's the sensor that's faulty. DTC Detecting Condition; Heater current of 0.25 A or less when the heater operates (2 trip detection logic) Trouble Area; Open or in heater circuit of A/F sensor (bank 1, 2 sensor 1) A/F sensor (bank 1, 2 sensor 1) heater ECM DTC P1150 A/F Sensor Circuit Range/Performance Malfunction (Bank 2 Sensor 1) CIRCUIT DESCRIPTION Refer to DTC P0125 (Insufficient Coolant Temp. for Closed Loop Fuel Control) Open or short in A/F sensor (bank 1, 2 sensor 1) circuit A/F sensor (bank 1, 2 sensor 1) ECM You may as well replace both A/F sensors because if the one on the front of the car is faulty then the other one towards the rear of the car is probably right behind it. We replaced our b2s1 a/f sensor, then the motor went t*ts up and I had to replace/rebuild another motor. The vehicle was down for quite a few months while I did this. I just got it running a couple months ago now we have a P0125 and P01135 codes, now we have to replace the rearward a/f sensor (which is bank 1 sensor 1). The sensor on the front of the car, top of the motor is bank 2 sensor 1 Hope this helps.
  2. P0125 Insufficient Coolant Temp. for Closed Loop Fuel Control. I've read a lot of forums about people saying this is a coolant temp sensor or thermostat, but TIS (Toyota Information System) says that is has to do with an A/F (air/fuel ratio) sensor. Here is the condition and trouble area directly from TIS. (I've worked for Toyota and Lexus for a few years and have access to to TIS); DTC Detecting Condition; P0125 After the engine is warmed up, A/F sensor output* does not change when conditions (a), (B), and © continue for at least 1.5 min. *: The output value changes at the inside of the ECM only. (a) Engine speed: 1,500 rpm or more (B) Vehicle speed: 40 ∼ 100 km/h (25 ∼ 62 mph) © Throttle valve does not fully close Trouble Area; Open or short in A/F sensor circuit (bank 1, 2 sensor 1) A/F sensor (bank 1, 2 sensor 1) ECM DTC P1155 A/F Sensor Heater Circuit Malfunction (Bank 2 Sensor 1) (the front of the motor, upstream sensor) If you open the hood and look straight down at the exhaust manifold, that's the sensor that's faulty. DTC Detecting Condition; Heater current of 0.25 A or less when the heater operates (2 trip detection logic) Trouble Area; Open or in heater circuit of A/F sensor (bank 1, 2 sensor 1) A/F sensor (bank 1, 2 sensor 1) heater ECM DTC P1150 A/F Sensor Circuit Range/Performance Malfunction (Bank 2 Sensor 1) CIRCUIT DESCRIPTION Refer to DTC P0125 (Insufficient Coolant Temp. for Closed Loop Fuel Control) Open or short in A/F sensor (bank 1, 2 sensor 1) circuit A/F sensor (bank 1, 2 sensor 1) ECM You may as well replace both A/F sensors because if the one on the front of the car is faulty then the other one towards the rear of the car is probably right behind it. We replaced our b2s1 a/f sensor, then the motor went t*ts up and I had to replace/rebuild another motor. The vehicle was down for quite a few months while I did this. I just got it running a couple months ago now we have a P0125 and P01135 codes, now we have to replace the rearward a/f sensor (which is bank 1 sensor 1). The sensor on the front of the car, top of the motor is bank 2 sensor 1 Hope this helps.
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