P007F - Charge Air Cooler Temperature Sensor Bank 1/Bank 2 Correlation
Last updated:
System
Powertrain (Engine & Gearbox)
Related Fault Codes
Technical Description
P007F is stored when the Engine Control Unit (ECU) detects an implausible correlation between the Charge Air Cooler (CAC) temperature sensors for Bank 1 and Bank 2. On dual-bank or twin-turbo systems, the ECU compares the readings from both sensors. If the temperature delta exceeds a calibrated threshold (typically 10-15°C) during steady-state operation, the ECU flags a correlation error. This sensor data is critical for calculating air charge density, which affects fuel trim and boost pressure management.
Possible Causes
Faulty Charge Air Cooler Temperature (CACT) sensor on one bank
Damaged wiring or corroded connectors (intermittent high resistance)
Obstructed or fouled intercooler core on one side
Boost leak affecting airflow/temperature on one specific bank
ECM software bug requiring an update
Symptoms
Recommended Solution
- Visual Inspection: Check wiring and connectors for both CACT sensors for fraying, heat damage, or corrosion.
- Comparison Test: Using a scan tool, monitor sensor temperatures on a cold engine (Key ON, Engine OFF). Both sensors should read within 2-3 degrees of each other and ambient temperature. If one is significantly different, it is likely faulty.
- Electrical Testing: Verify the 5V reference signal and ground integrity at the connector. Check sensor resistance (Ohms) and compare with OEM specifications (e.g., at 20°C/68°F).
- Mechanical Check: Inspect intercoolers for debris or physical damage. Check for boost leaks on the affected bank.
- Replacement: Replace the failing sensor and clear the DTCs from the ECM memory.
Mechanic's Tip
Before replacing expensive components, always double-check wiring and connections. 80% of all sensor faults are actually due to corroded contacts or broken wires.
Do you also have
other fault codes?
See how P007F connects with your other fault codes. Our advanced analysis tool identifies causal relationships and root causes directly.