Faulty or drifting charge air cooler temperature sensor on one bank; Damaged wiring, corroded terminals or loose connector at one of the sensors; Boost or intake air leak, or split hose or pipe near one sensor, causing different readings; Blocked, oil-soaked or damaged charge air cooler or uneven airflow through it; Sensor contaminated by oil or condensation; Fault in the engine control unit sensor circuit or reference supply; Outdated control unit software where the manufacturer has issued an update for this code.

P007F

Charge Air Cooler Temperature Sensor Bank1/Bank2 Correlation.

Generic
Powertrain
Generic code
Medium severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
0: AreaFuel and air metering, auxiliary emission controls
7F: FaultThe specific fault in that area

What it means

P007F is the generic code for a correlation fault between the charge air cooler (intercooler) temperature sensors on bank 1 and bank 2. The engine control unit compares the two readings, which should be close under similar conditions such as a cold start or steady running. When the difference is larger than expected, or one sensor does not track the other, it sets the code. It points to a sensor, wiring or airflow problem, but does not say which side is at fault.

Symptoms

Engine management warning light on
Reduced power or limp mode under boost
Poor or hesitant acceleration
Higher fuel consumption than usual
Possible hot-running or intake air temperature related boost cut-back
Rough running in some cases

Possible causes

Faulty or drifting charge air cooler temperature sensor on one banklikely
Damaged wiring, corroded terminals or loose connector at one of the sensorslikely
Boost or intake air leak, or split hose or pipe near one sensor, causing different readingspossible
Blocked, oil-soaked or damaged charge air cooler or uneven airflow through itpossible
Sensor contaminated by oil or condensationpossible
Fault in the engine control unit sensor circuit or reference supplyrare
Outdated control unit software where the manufacturer has issued an update for this coderare

How to diagnose

Read all stored and pending codes and the freeze frame data, noting engine temperature, load and intake temperatures when the code set.
Check live data for both bank sensors with the engine cold and compare them with each other and with ambient temperature; they should be close.
Visually inspect both sensors, their connectors and wiring for damage, chafing, heat damage, corrosion or oil contamination.
Check the intake and charge air pipes, clamps and hoses for leaks, splits or oil residue, and inspect the intercooler for damage or blockage.
Wiggle test the harness and connectors while watching live data for jumps or dropouts.
Measure the sensor resistance and compare it with the manufacturer's temperature table, and check the supply voltage and signal at the connector.
Swap or compare readings after warm-up and under load to see which sensor lags or sticks.
Check for applicable manufacturer service bulletins or software updates, as the layout and strategy vary by model and engine.

How to fix

Replace the faulty charge air cooler temperature sensor.
Repair or replace damaged wiring, and clean or renew corroded connectors.
Repair boost leaks by replacing split hoses, pipes or clamps.
Clean or replace a blocked or damaged charge air cooler as the inspection shows.
Clear oil contamination at its source, such as a failing turbo seal or breather fault, then replace contaminated parts.
Update the control unit software only where an outdated calibration is a known cause for this model.

Can I keep driving?

Medium severity

The car can usually be driven short distances, but expect reduced power, and have it checked soon. Continued driving with a real boost leak or cooling problem could cause further faults or engine strain.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.