Have you tried the Battery and cables. I ahev the same Problem. What is the immobilizer? Is that the symbol with the x through the car???

Just screw it back in, it is the ECT, goes next to the Thermostat. Also, look for the red bled valve on the right side of the motor on a hose that goes to the bottom of the radiator hose. This is for bleding the air out oif the system and can cause a continued PO128 error.

How do I bleed the cooling system S40 2004??? I have found the red valve, but what is the method???

Axle replacement is the solution. Almost sure. There is a shop here in Dallas, they say they replace 5 a week.

CEL from a po128 error still on? This error indicates a low temperature in cooling system. 1- low coolant level, I changed the anti-freeze it had water. 2- Thermostat bad, I changed that too, 3- ECT- I changed that too. I have been told to check the voltage getting to the ECT- it should be 12 volts....

I have the same problem. Help too. It is tthat the car runs at a lower temperature can normal. check the ant-freeze, the thermostat, and ect. They say it can be the voltabe getting to the ECT is not 12 volts. Check the fans too, that they are not on all the time. Tomorrow I am going to review this p...