What Does P007C Mean?
This code indicates the charge air cooler temperature sensor signal voltage on bank 1 is below the minimum expected threshold (typically below 0.1-0.2V). For an NTC thermistor sensor, a low voltage reading corresponds to an extremely high indicated temperature or a short-to-ground in the circuit. The ECM will use a default temperature value, which may limit boost or enrich fuel mixtures excessively.
Common Causes
35%
Short-to-ground in the signal wire between the CAC temperature sensor and ECM
30%
Internally shorted CAC temperature sensor thermistor element with near-zero resistance
20%
Water or oil intrusion in the sensor connector causing a conductive path to ground
15%
Damaged sensor ground wire contacting the signal wire, pulling signal voltage low
Diagnostic Steps
1
Disconnect the CAC temperature sensor and check the signal voltage at the harness connector with key on. If voltage rises to approximately 5V with sensor disconnected, the wiring is good and the sensor is faulty (internally shorted).
2
If voltage remains low with the sensor disconnected, check the signal wire for a short-to-ground by measuring resistance from the signal pin to engine ground. Should be OL (open) with sensor disconnected.
3
Inspect the sensor connector and harness for moisture, oil contamination, or physical damage. Clean connectors with electrical contact cleaner and verify seal integrity.
4
Trace the signal wire from the sensor to the ECM, checking for chafed insulation or pinched wires that could create a ground path.
5
Measure sensor resistance directly. At room temperature (68°F/20°C), it should be approximately 2,000-3,000 ohms. Near 0 ohms confirms an internal short.
Estimated Repair Cost
$40 - $250
Parts + labor, varies by vehicle and location
This code indicates the charge air cooler temperature sensor signal voltage on bank 1 is below the minimum expected threshold (typically below 0.1-0.2V). For an NTC thermistor sensor, a low voltage reading corresponds to an extremely high indicated temperature or a short-to-ground in the circuit. Th...
The most common cause of P007C (Charge Air Cooler Temperature Sensor Circuit Low Bank 1) is: Short-to-ground in the signal wire between the CAC temperature sensor and ECM
Typical repair costs for P007C range from $40 to $250, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The ECM will likely enter a reduced power mode to protect against potential detonation from inaccurate charge air temperature readings. Vehicle remains safe to drive but with limited performance.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P007C to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Turbocharger/Supercharger Boost Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
