Faulty or contaminated charge air cooler temperature sensor reading out of range or slow to respond; Damaged wiring, chafed insulation or poor connection at the sensor plug causing a wrong or erratic signal; Corroded or loose connector terminals or water ingress in the sensor connector; Heat soak or an intercooler or charge pipe problem, such as a leak or blockage, causing temperatures that do not match expectations; Sensor reference voltage or ground fault in the circuit; Fault inside the engine control unit.

P007B

Charge Air Cooler Temperature Sensor Circuit Range/Performance 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
7B: FaultThe specific fault in that area

What it means

P007B means the engine control unit has found that the charge air cooler temperature sensor signal on Bank 1 is not sensible or does not match expected behaviour. The sensor reads the temperature of the air leaving the intercooler. The code sets when the reading is stuck, drifts, or disagrees with other temperature inputs such as intake air and coolant temperature, or with the expected response under load.

Symptoms

Engine warning light on
Reduced power or the engine going into limp mode
Poor or hesitant acceleration under boost
Higher fuel consumption
Possible black smoke or rough running under load
Other boost or intake air temperature codes stored alongside

Possible causes

Faulty or contaminated charge air cooler temperature sensor reading out of range or slow to respondlikely
Damaged wiring, chafed insulation or poor connection at the sensor plug causing a wrong or erratic signallikely
Corroded or loose connector terminals or water ingress in the sensor connectorpossible
Heat soak or an intercooler or charge pipe problem, such as a leak or blockage, causing temperatures that do not match expectationspossible
Sensor reference voltage or ground fault in the circuitpossible
Fault inside the engine control unitrare

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
Visually inspect the sensor, its connector and the wiring run for damage, chafing, oil contamination or corrosion
Check the charge air system for split hoses, loose clamps, oil build-up or a damaged intercooler
With the engine cold, compare the live charge air cooler temperature reading with intake air and coolant temperature; they should be close
Watch the live reading while warming up and under load to see whether it moves smoothly or sticks, jumps or reads implausible values
Check the sensor resistance against the manufacturer's specification at a known temperature, as values vary by model and engine
Test the sensor circuit for reference voltage, ground and wiring continuity, and for shorts to ground or supply, following the wiring diagram for the vehicle
Check for relevant software updates or technical bulletins for the model if no hardware fault is found

How to fix

Replace the charge air cooler temperature sensor if it is out of specification or reads implausibly
Repair or replace damaged wiring and renew the connector or terminals if corroded or loose
Fix any charge air leaks, replace split hoses and secure clamps
Clean or replace a blocked or oil-soaked intercooler or charge pipes as the inspection indicates
Update the engine control unit software only if an outdated calibration is a known cause for that model
Clear the codes after repair and road test to confirm the fault does not return

Can I keep driving?

Medium severity

The car can usually be driven carefully for a short time, but power may be limited and the fault should be fixed soon. Avoid heavy loads and hard acceleration, and stop if the engine runs badly or other warnings appear.

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