Faulty charge air cooler temperature sensor (internal fault or drift); Damaged, chafed or corroded wiring to the sensor (open circuit or short); Loose, corroded or contaminated sensor connector terminals; Oil, moisture or heat damage at the sensor from a leaking charge air system; Sensor reading implausible because of a restricted or heavily fouled charge air cooler or intake leak; Fault in the engine control unit sensor input or supply.

P007A

Charge Air Cooler Temperature Sensor Circuit Bank 1.

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
7A: FaultThe specific fault in that area

What it means

P007A is the generic code for a fault in the charge air cooler (intercooler) temperature sensor circuit on bank 1. The engine control unit has seen a signal from the sensor that is outside the expected range, or that does not make sense, so it sets the code. The exact trigger (short to ground, short to voltage, open circuit or implausible signal) depends on the vehicle, and sensor position varies by engine.

Symptoms

Engine warning light on
Reduced power or the engine going into limp mode
Poor acceleration or turbo boost that feels flat
Hesitation or uneven running under load
Slightly higher fuel consumption
Occasional black smoke or rough running in some conditions

Possible causes

Faulty charge air cooler temperature sensor (internal fault or drift)likely
Damaged, chafed or corroded wiring to the sensor (open circuit or short)likely
Loose, corroded or contaminated sensor connector terminalslikely
Oil, moisture or heat damage at the sensor from a leaking charge air systempossible
Sensor reading implausible because of a restricted or heavily fouled charge air cooler or intake leakpossible
Fault in the engine control unit sensor input or supplyrare

How to diagnose

Read all stored and pending codes and record freeze frame data, noting engine temperature, load and intake air temperature when the fault set.
Check for related codes such as intake air temperature, boost pressure or sensor supply faults, which may point to a shared wiring or supply fault.
Visually inspect the sensor, its connector and the wiring along its route for chafing, heat damage, oil contamination, water ingress and bent or corroded terminals.
With the engine cold, compare the live charge air temperature reading with the intake air and coolant temperatures; they should be close to each other.
Check the sensor signal and reference supply at the connector and measure the sensor resistance against the manufacturer's specification for your model.
Wiggle test the harness and connector with the engine running while watching live data for sudden jumps or dropouts.
Inspect the charge air pipes and cooler for oil, leaks, splits or blockages, as these can affect readings and boost.
If wiring and sensor test fine, check the control unit connector and grounds, and consult manufacturer information for control unit testing.

How to fix

Replace the charge air cooler temperature sensor if its resistance or signal is out of specification.
Repair or replace damaged wiring, ensuring correct routing and securing it away from heat and sharp edges.
Clean, repair or replace corroded or loose connector terminals, and renew the connector if needed.
Repair any charge air leaks and address the cause of oil or moisture contamination.
Clean or replace a blocked or damaged charge air cooler if it is found to be the cause.
Repair or replace the control unit only after all wiring and sensor faults have been ruled out and the fault is confirmed.

Can I keep driving?

Medium severity

The car can usually be driven for a short time, but power may be limited and the fault should be fixed soon. Avoid heavy loads and hard acceleration until it is repaired, especially if the car is in limp mode.

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