As the title says, my G448 sensor reading on my app says it is 222*c all the time, whether the new sensor is plugged in or not. I checked the wiring going into the ECU and it's like new, with no evidence of water damage or tampering.
This tells me that somewhere along the wiring for the sensor, there is some resistance due to a dodgy wire or even dodgy socket for the sensor to plug into.
If my understanding is correct, it's a 5V line with a small resistor on the ECU/PCM, and then resistance on the sensor gives an accurate temperature setting.
What do you guys recommend I do next? I can check things like continuity, resistance, voltage, etc with a device, but I think that the stuck reading explains more of a wiring issue from A to B?
Thanks
EDIT: Car is a 2007 3.0TDI CAPA engine.
This tells me that somewhere along the wiring for the sensor, there is some resistance due to a dodgy wire or even dodgy socket for the sensor to plug into.
If my understanding is correct, it's a 5V line with a small resistor on the ECU/PCM, and then resistance on the sensor gives an accurate temperature setting.
What do you guys recommend I do next? I can check things like continuity, resistance, voltage, etc with a device, but I think that the stuck reading explains more of a wiring issue from A to B?
Thanks
EDIT: Car is a 2007 3.0TDI CAPA engine.