DTC P026A-77: Charge Air Cooler Efficiency Below Threshold - Commanded position not reachable: Action
- Check charge air cooler system for mechanical integrity
- Check cooling system for mechanical and fluid integrity
- Refer to the electrical circuit diagrams and check the charge air coolant sensor circuit for short circuit to ground, short circuit to power, open circuit, high resistance
- Inspect connectors for signs of water ingress and pins for damage and/or corrosion
- Install a new charge air coolant pump, only when diagnosed as failed
- Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest