Installed new radiator and the aftermarket do88 IC and now have a code 'intake air temperature signal low'. Car runs but has rough idle, and when i rev it, it seems slow to rev and 'weak'. Is the IAT integrated into the boost pressure sensor mounted on the IC? Is the rough idling and all possibly due to the car trying to relearn with the new IC? Any help appreciated.
2006 s60r
p0113 after do88 IC install
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renegade420
- Posts: 35
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- Year and Model: 2006 s60r
- Location: USA
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EngineeringBloke
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- Year and Model: 2006 2.5T S60
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The IAT is in the MAF.
The MAF has a hot plate that measures cooling as air flows past it. The plate is inside the pinkie-finger sized Bosche MAF sensor. On the outside of the sensor is a thermistor that measures the intake air temperature (IAT). All this is inside the pipe that runs from the air filter box to the turbo intake.
The air mass is computed from the energy supplied to maintain a temperature on the heated plate as it is cooled by different masses of air. Without the temperature measurement, the air mass reading would be wrong as more energy is needed when the air is colder.
While there is a MAP/boost pressure sensor to measure the air pressure between the turbo and the intake manifold, I am not aware of any other air temperature measurements before the cat. (Of course, there is a electronic coolant temperature sensor mounted on the coolant thermostat.) This pressure reading does not require a temperature compensation.
Is there another IAT sensor? I don't think the R is different to my 2006 S60 non-R in that way.
Without an accurate IAT reading, it is likely the ECU cannot determine the air mass, hence also unable to set the A/F ratio stocastically. Can you get all the codes read and report them?
The MAF has a hot plate that measures cooling as air flows past it. The plate is inside the pinkie-finger sized Bosche MAF sensor. On the outside of the sensor is a thermistor that measures the intake air temperature (IAT). All this is inside the pipe that runs from the air filter box to the turbo intake.
The air mass is computed from the energy supplied to maintain a temperature on the heated plate as it is cooled by different masses of air. Without the temperature measurement, the air mass reading would be wrong as more energy is needed when the air is colder.
While there is a MAP/boost pressure sensor to measure the air pressure between the turbo and the intake manifold, I am not aware of any other air temperature measurements before the cat. (Of course, there is a electronic coolant temperature sensor mounted on the coolant thermostat.) This pressure reading does not require a temperature compensation.
Is there another IAT sensor? I don't think the R is different to my 2006 S60 non-R in that way.
Without an accurate IAT reading, it is likely the ECU cannot determine the air mass, hence also unable to set the A/F ratio stocastically. Can you get all the codes read and report them?
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