P007B — Charge Air Cooler Temperature Sensor Circuit Range/Performance Bank 1

powertrain (engine/transmission)

Is it safe to drive?

Repair soon; reduced boost possible P007B can cause the engine controller to limit boost or enter a reduced-power strategy, especially under load. Avoid sustained high-speed or heavy acceleration until the fault is corrected, and stop driving if charge-air temperature warnings, smoke, or severe power loss occur.

Typical symptoms

A illuminated check engine light with P007B stored in the powertrain system
Lower-than-normal boost or turbo pressure, particularly during acceleration
Hesitation, surging, or sluggish throttle response
Increased fuel-trim values or reduced-power operation commanded by the engine controller
A P007B code that returns after the engine warms under traffic or load
A hissing or whistling intake noise when a charge-air leak is contributing to the fault

Common causes

A failed Bank 1 charge air cooler temperature sensor with internal drift, an open circuit, or an implausible fixed reading
Damaged wiring or a corroded connector affecting the sensor 5-volt reference, signal, or ground circuit
A loose, cracked, or improperly sealed charge air duct connection that causes unstable temperature readings around the sensor
Restricted charge air cooler airflow or an inoperative charge-air cooling fan, if equipped, allowing the measured temperature to exceed expected limits
A poorly seated sensor, bent connector pin, or fluid intrusion at the sensor seal where it enters the charge-air passage

How to diagnose with an OBD scanner

Read P007B data with an OBD scanner Connect an ELM327 adapter to the OBD-II port and use AIScanAuto or another scanner to check stored, pending, and freeze-frame information for P007B. If supported, compare live Bank 1 charge air cooler temperature with ambient, intake, MAP, and boost readings. A fixed value, an open-circuit value, or a reading that changes implausibly points toward the sensor or its circuit.
Inspect the sensor and charge-air area Allow the charge-air system to cool, then locate the Bank 1 charge air cooler temperature sensor on or near the charge air cooler outlet. Inspect the connector, wiring, sensor body, nearby hoses, clamps, seals, and charge-air ducts. Look for corrosion, pin damage, oil or coolant contamination, heat damage, and air leakage.
Test the sensor circuit Using the manufacturer wiring diagram and pinout, test the sensor supply, ground, signal voltage, and resistance as the engine is slowly warmed. Confirm that an open, short, or excessive resistance is not present. If the wiring and connectors pass, compare the sensor response with a known good temperature measurement to determine whether the sensor itself has drifted.
Verify charge-air cooling and pressure Check for restricted charge air cooler airflow, an inoperative cooling fan where fitted, incorrect hose routing, and boost leaks. Verify that the sensor reading agrees with actual boost and intake conditions. A genuine high-temperature condition must be corrected before assuming that P007B is simply a failed sensor.
Repair and confirm the fix Replace the Bank 1 charge air cooler temperature sensor with the correct specified part if testing fails, or repair the damaged circuit and seals. Reconnect everything, clear P007B with the scanner, and complete a warm drive under load. Confirm that the code does not return and that charge-air temperature, boost, fuel trims, and throttle response now behave normally.

Approximate repair cost

A typical independent-shop estimate is $180 to $700 USD for P007B diagnosis and a likely sensor, connector, or wiring repair. Labor rates, sensor access, and the need for additional charge-air work can change the total. Figures are estimates and vary by region.

Common questions

What does P007B specifically identify?

P007B identifies a range or performance problem with the Bank 1 charge air cooler temperature sensor or its signal circuit. The controller has detected an implausible value, poor sensor response, or a temperature condition outside its expected operating range.

Can I continue driving with P007B?

You can usually drive cautiously to a repair shop, but P007B may reduce boost, increase fuel consumption, or limit engine output. Avoid heavy acceleration and prolonged high-speed driving, especially if the check engine light flashes or the vehicle loses substantial power.

What causes P007B besides a bad temperature sensor?

Common P007B causes include damaged sensor wiring, a corroded connector, charge-air leaks, poor sensor sealing, or restricted cooling airflow. An actual excessive charge-air temperature caused by a cooling fan or airflow fault can also make P007B set.

How is P007B diagnosed and repaired?

A technician reads P007B freeze-frame and live data with an OBD scanner, inspects the Bank 1 sensor and wiring, and performs circuit and response tests. The confirmed sensor, connector, seal, wiring, or airflow fault is repaired, and P007B is cleared and verified during a loaded drive.

When your scan tool returns P007B, the engine control unit has identified that a temperature sensor in the turbo system's cooling circuit is sending readings outside the expected range. Officially this is the Charge Air Cooler Temperature Sensor Circuit Range/Performance Bank 1 code, classified under the powertrain category because it directly involves the engine management system.

To understand P007B, it helps to know what the charge air cooler does. On turbocharged and supercharged engines, the compressed intake air heats up significantly. The charge air cooler—essentially an air-to-air or air-to-water intercooler—cools that air before it enters the cylinders. More dense, cooler air means better combustion and more power. The ECU relies on a temperature sensor in this circuit to calculate fuel delivery, boost pressure, and valve timing. When the signal from that sensor drifts too far from where it should be, the computer flags the fault.

P007B triggers when the ECU runs the sensor through its self-check routine over one or more drive cycles. It compares the actual voltage or resistance reading against factory-defined thresholds. If the number falls outside that window—either too high, too low, or changing too slowly—the module logs the code and captures a freeze frame snapshot. That snapshot records RPM, engine load, coolant temperature, and vehicle speed at the exact moment the fault was detected, which is invaluable when you start troubleshooting.

Common Symptoms of P007B

The Check Engine light is the most obvious sign. Beyond that, you may notice one or more of the following:

Erratic or complete loss of boost-related functions (intercooler pump, diverter valve)
Noticeably higher fuel consumption than usual
Reduced engine power or a limp-home mode depending on which component is affected
Rough idle or intermittent stalling in some vehicle applications
Inconsistent turbo response or boost spikes
Possible overheating of intake air if the sensor reads falsely high

What Causes P007B

The fault can originate in several places along the signal path. Here are the most common culprits ranked roughly by how often they show up:

Damaged, corroded, or loose electrical connectors at the charge air cooler temperature sensor
Wiring issues such as chafing, broken strands, or insulation damage in the sensor circuit
A failed or drifting temperature sensor itself
Blown fuse or interrupted power supply to the sensor circuit
Poor ground connection at the sensor or ECU
Faulty control module driver for the affected circuit (less common but possible)

How to Diagnose P007B

Follow these steps in order to avoid replacing parts unnecessarily:

Connect an OBD2 scanner, confirm P007B is stored, and record the freeze frame data. This tells you the engine operating conditions when the fault first appeared.
Look for related diagnostic trouble codes. Secondary codes in the same circuit often point to the root cause—ensor failure versus wiring damage, for example.
Search for manufacturer technical service bulletins (TSBs) tied to your make, model, and model year. Many P007B complaints have documented factory fixes or updated software calibrations.
Perform a visual inspection of the sensor connector and surrounding wiring harness. Pull back the loom and check for broken wires, corrosion, bent pins, or evidence of moisture intrusion.
With the connector unplugged, measure reference voltage at the power pin and verify ground continuity at the ground pin using a multimeter. Then check signal circuit resistance from the sensor to the ECU.
Clear the code, complete a test drive that reproduces the freeze frame conditions (similar speed, load, and temperature), and verify P007B does not return.

Repair Options and Costs

Begin with the least expensive repairs before moving to costly components:

Repair	Typical Cost (Parts + Labor, USD)
Wiring harness repair or connector replacement	$80 – $250
Charge air cooler temperature sensor replacement	$150 – $500
Control module diagnosis and repair	$300 – $1,000

Total out-of-pocket for fixing P007B typically falls between $80 and $1,000 depending on which part failed. Proper diagnosis upfront prevents wasting money on parts you do not need.

Can You Drive with P007B?

P007B is classified as short-term severity—the vehicle usually remains drivable. You may experience a slight drop in power, worse fuel economy, or a disabled auxiliary system, but the engine should still run.

That said, do not ignore it. If you notice stalling, failure to start, or any warnings related to braking and steering, stop driving immediately and arrange professional service. Otherwise, schedule repairs at your convenience but before other related issues develop.