Faulty or drifting charge air cooler temperature sensor or intake air temperature sensor on Bank 2; Damaged wiring, corroded terminals or poor connector contact in the sensor circuit; Charge air cooler heat soak, restricted airflow or blocked cooler fins affecting real temperatures; Boost or intake air leak after the cooler letting hot or unmetered air affect the readings; Sensor fitted in the wrong position, loose in its housing or contaminated with oil or debris; Fault in the engine control unit or its sensor supply or reference voltage.

P011D

Charge Air Cooler Temperature/Intake Air Temperature Correlation Bank 2.

Generic
Powertrain
Generic code
Medium severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
1: AreaFuel and air metering
1D: FaultThe specific fault in that area

What it means

P011D is a generic code meaning the temperature reading from the charge air cooler (intercooler) sensor does not correlate sensibly with the intake air temperature reading on Bank 2. The control unit compares the two readings, usually under conditions where they should be close, such as after a cold soak or at steady running, and sets the code when the difference is larger than expected. Sensor position and the exact test conditions vary by model and engine.

Symptoms

Engine warning light on
Reduced power or limp mode on some vehicles
Poor throttle response or hesitation under boost
Rough running or uneven idle
Poorer fuel economy
Possible boost-related fault codes stored alongside

Possible causes

Faulty or drifting charge air cooler temperature sensor or intake air temperature sensor on Bank 2likely
Damaged wiring, corroded terminals or poor connector contact in the sensor circuitlikely
Charge air cooler heat soak, restricted airflow or blocked cooler fins affecting real temperaturespossible
Boost or intake air leak after the cooler letting hot or unmetered air affect the readingspossible
Sensor fitted in the wrong position, loose in its housing or contaminated with oil or debrispossible
Fault in the engine control unit or its sensor supply or reference voltagerare

How to diagnose

Read all stored codes and freeze frame data, noting engine temperature, load and ambient conditions when the code set
Check for related codes for intake air temperature, boost pressure or airflow and deal with those first
Visually inspect the sensor wiring, connectors and terminals on Bank 2 for damage, water ingress, chafing or corrosion
With the engine fully cold, compare live intake air temperature and charge air cooler temperature readings with each other and with ambient temperature; they should be close
Compare the Bank 1 and Bank 2 readings where fitted, and check how each responds as the engine warms up and under load
Check the sensor resistance or signal voltage against the manufacturer's specification for the model and engine
Inspect the charge air cooler, pipes and clamps for leaks, oil contamination, blockage or damaged fins
Check the sensor supply and reference voltage and ground at the connector, and test wiring continuity if readings are implausible

How to fix

Replace the faulty temperature sensor with a correct specification part
Repair or replace damaged wiring and connectors, and clean or renew corroded terminals
Repair boost or intake leaks and refit loose clamps or pipes
Clean or replace a blocked or damaged charge air cooler and restore proper airflow to it
Refit or reseat the sensor correctly with a new seal if it is loose or wrongly positioned
Where a control unit fault is confirmed, repair or replace it, or apply a manufacturer calibration update if one is known to address the fault

Can I keep driving?

Medium severity

The car can usually be driven short distances carefully, but have it checked soon as the control unit may limit power and poor charge temperature data can affect running. Stop driving if the car goes into limp mode, runs roughly or other warnings appear.

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