Hello everyone,
I own an Audi A2 production year 2001. I have seen many threads here about the coolant temperature sensor problem in many Audi A2. Mine though seems a little odd, as while city driving the temerature reaches 90°C (as it should) and I can see that it operates in the normal fuel range for urban driving (5-6 l/100km) but when in fast roads (inter urban) it goes to around 7 l/100km but I can also see the temperature gauge go below 90 to aroujd 70°C. (calculation is more of a guessing using the odometer and the portion of wated fuel) I know that the ECU when sees temps below 90 tries to add more fuel to the system to heat up the engine. Im not sure though if this water coolant temp is observed from the ECU or whether any other sensor is observed. Also I don't think the sensor is not working as in urban driving, the voolant temp does not move either above 90 or brlow 90. In all cases the heater has been off. Do you guys think is the thermostat staying open? Also another observation when the A/C is on on cold air while idling the temps tend to go down insted of up. I know I must have a vacumm leak somewhere as when in 5th gear at around 3000rpm the car goes in limp mode and turn off the turbo. Not sure if this is related but I still adeed it. Any help would be appriciated.
I own an Audi A2 production year 2001. I have seen many threads here about the coolant temperature sensor problem in many Audi A2. Mine though seems a little odd, as while city driving the temerature reaches 90°C (as it should) and I can see that it operates in the normal fuel range for urban driving (5-6 l/100km) but when in fast roads (inter urban) it goes to around 7 l/100km but I can also see the temperature gauge go below 90 to aroujd 70°C. (calculation is more of a guessing using the odometer and the portion of wated fuel) I know that the ECU when sees temps below 90 tries to add more fuel to the system to heat up the engine. Im not sure though if this water coolant temp is observed from the ECU or whether any other sensor is observed. Also I don't think the sensor is not working as in urban driving, the voolant temp does not move either above 90 or brlow 90. In all cases the heater has been off. Do you guys think is the thermostat staying open? Also another observation when the A/C is on on cold air while idling the temps tend to go down insted of up. I know I must have a vacumm leak somewhere as when in 5th gear at around 3000rpm the car goes in limp mode and turn off the turbo. Not sure if this is related but I still adeed it. Any help would be appriciated.