P007D - CHARGE AIR COOLER TEMPERATURE SENSOR CIRCUIT HIGH BANK 1

The charge air cooler temperature sensor (CACT) is used to measure the temperature and concentration of the air passing through the charge air cooler. This data is sent to the PCM (Powertrain Control Module) to be compared with the engine coolant temperature and EGR (Exhaust Gas Recirculation) temperature to check cooler performance. This sensor is usually located in the same housing as the Boost Pressure Sensor.

The DTC P007D OBD2 code setting is due to the PCM detecting excessively high voltage signals in the charge air cooler temperature sensor circuit.

• Check Engine light illuminated.
• Noticeable lack of engine power.
• Increased fuel consumption.
• Diesel Particulate Filter regeneration is not possible.
• Fail-Safe mode activated.

The reasons for the P007D OBDII fault code setting are:

• The electrical circuit wires or connectors may have been damaged.
• The charge air cooler temperature sensor may be bad.
• The charge air cooler may have obstructions or deficiencies.

The steps to follow for troubleshooting the P007D OBD2 diagnostic code are:

• As a first step for the diagnosis, you should consult the Technical Service Bulletins (TSB).
• Inspect the wires associated with the Charge Air Cooler Temperature Sensor and verify that they are not burned or corroded. Also, we recommend that you check that the charge air cooler connections and ductwork are in good condition. Make any necessary repairs.
• Measure the resistance between the two terminals of the charge air cooler temperature sensor. Then, start the engine and check the multimeter to see if the sensor values decrease as the engine temperature rises. If the resistance of the sensor does not decrease with increasing temperature, the sensor is defective, replace it.
• With the multimeter verify the presence of 5 volts of reference for the circuit. If not, there is an open circuit between the Powertrain Control Module and the sensor. Make the necessary repairs.
• Check the sensor ground circuit for proper operation. If an open circuit is found, you should proceed with repairs.