|Code||Fault Location||Probable Cause|
|P007D|| Charge Air Cooler Temperature Sensor Circuit High |
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Table of Contents
- What Does Code P007D Mean?
- Where is the P007D sensor located?
- What are the common causes of code P007D?
- Codes Related to P007D
- Get Help with P007D
What Does Code P007D Mean?
A stored code P007D – Charge Air Cooler Temperature Sensor Circuit High code indicates that the powertrain control module (PCM) has detected excessive voltage on the charge air cooler temp sensor (CACTS) circuit. This type of code pertains to vehicles equipped with turbochargers and superchargers exclusively.
This type of code can be particularly confusing since the heading seems to denote “high” voltage. Like most intake air temperature monitoring circuits, the CACTS circuit utilizes a 5-volt maximum reference signal that is diminished as the flow of intake air increases across an exposed thermal resistor. Therefore, a high voltage code (P007D) is typically caused by an open in the CACTS circuit.
The CACTS is threaded into the air duct in a manner that allows intake air to flow freely across an exposed hot wire with an integrated thermal resistor. The CACTS circuit is supplied with a 5-volt reference and a ground. The exposed hot wire and thermal resistor complete the circuit. As the flow of intake air increases across the exposed hot wire, CACTS circuit voltage decreases due to increased resistance in the thermal resistor. The PCM compares input data voltage received from various sources – such as the manifold absolute pressure (MAP) sensor – to CACTS circuit voltage and calculates whether it is within specified parameters. If CACTS circuit voltage is not within specifications, a code will be stored, and a malfunction indicator lamp (MIL) may be illuminated.
Where is the P007D sensor located?
Turbocharged and supercharged engines (gasoline and diesel) are much more efficient when supplied with cooler, denser air. This is accomplished using a network of sealed air ducts and some type of intercooler. Production vehicles most commonly use air-to-air intercoolers which are mounted near the front grille in order to collect cool ambient air. The CACTS is located in the air duct between the intercooler and the throttle body/intake manifold on turbocharged engines like the Ford 6.7-liter Powerstroke, the GM Duramax diesel and the RAM 5.9-liter Cummins turbo diesel. Multiple supercharged Dodge V8 (gasoline) engine applications (Charger and Challenger Hellcat) use a CACTS sensor that is integrated into the Boost Control Sensor (BCS). The BCS is usually located in the supercharger housing or intake manifold (supercharged applications). BMW and Mercedes-Benz utilize a similar system.
What are the common causes of code P007D?
Professional technicians report that common causes of a stored P007D include:
- Charge air cooler temperature sensor unplugged (usually after repairs or maintenance are performed)
- Torn or disconnected air intake ducts
- Defective charge air cooler temperature sensor or wiring
- Faulty MAP sensor or wiring
- Corroded pins or wiring at charge air cooler temperature sensor connector
Codes Related to P007D
Related codes include a P0107 Manifold Absolute Pressure Sensor Circuit Low.
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