Engine code P007D

[GregJB102]

This code just popped up for “Charge Air Cooler Temperature Sensor Circuit High Bank 1.” I can’t seem to find any solid information on what can cause this/if it’s a serious issue or not. From what I understand it may be an electrical issue which is a topic I know very little about. If anyone can share some information that would be great.

 

[SteveS]

Here's a listing of what that code can mean and a diagnostic flow:

Causes
Possible causes for this P007D code include:

• Faulty sensor
• Wiring problems
• Failed or restricted charge air cooler
• Faulty PCM

Diagnostic and Repair Procedures
Begin by visually inspecting the charge air cooler temperature sensor and the corresponding wiring. Look for loose connections, damaged wiring, etc. Also, visually inspect the charge air cooler and ducting. If damage is found, repair as necessary, clear the code and see if it returns.
Next, check for technical service bulletins (TSBs) regarding the issue. If nothing is found, you will need to move forward to step by step diagnosis of the system.
The following is a generalized procedure, as testing for this code varies between vehicles. To accurately test the system, you’ll want to refer to the manufacture’s diagnostic flow chart.

• Do some preliminary circuit testing: use a scan tool to monitor the charge air coolant temperature sensor data parameter. Disconnect the CACT sensor; the scan tool value should drop to a very low value. Next, connect a jumper wire across the terminals. If the scan tool now displays a very high temperature, the connections are sound and the ECM can recognize the input. This means the problem is most like the sensor and not a circuit or PCM problem.
• Test the sensor: disconnect the charge air cooler temperature sensor connector. Next, measure the resistance between the two sensor terminals using a digital multimeter set to ohms. Start the engine and watch the meter value; the values should decrease smoothly as the engine warms up (check the engine temperature gauge on the dash to ensure the engine reaches operating temperature). If engine temperature increases but CACT resistance does not decrease, the sensor is faulty and should be replaced.

Check the circuit

• Check the reference voltage side of the circuit: with the ignition on, use a digital multimeter set to volts to check for a 5-volt reference from the PCM at one of the two charge air cooler temperature sensor terminals. If no reference signal is present, connect the meter set to ohms (with the ignition off) between the reference voltage pin on the CACT and the reference voltage pin on the PCM. If the meter reads out of limits (OL) there is an open circuit between the PCM and sensor that will need to be located and repaired. If the meter reads a numeric value, there is continuity.
• If everything is good up to this point, you’ll want to check that there is 5-volts coming out of the PCM at the reference voltage terminal. If there is not a 5-volt reference from the PCM, the PCM is probably faulty.
• Check the ground side of the circuit: connect the meter set to ohms (with the ignition off) between the ground terminal on the charge air cooler temperature sensor and the ground terminal on the PCM. If the meter reads out of limits (OL) there is an open circuit between the PCM and sensor that will need to be located and repaired. If the meter reads a numeric value, there is continuity. Finally, check that the PCM has a good ground by attaching one meter lead to the PCM ground terminal and the other to chassis ground. Once again, If the meter reads out of limits (OL) there is an open circuit between the PCM and ground that will need to be located and repaired.

 

[FiestaSTdude]

I had that code along with a bunch of other ones and it ended up being a complicated electrical issue that a professional mechanic had to fix

 

[Intuit]

Clear the code first then wait to see whether it comes back. Sometimes codes are generated in the process of modding something or maintenance. As a general rule, suspect lists should start with anything that has been changed from stock or messed with. Include incidents that may have generated front-end damage. Make sure your intercooler isn't blocked or restricted. It may help to know more about the running conditions that generated the code.