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DTC codes / P00xx · Fuel and air metering and auxiliary emission controls / P007D

P007DCharge Air Cooler Temperature Sensor Circuit High Bank 1

P007D means the engine computer has detected an abnormally high voltage on the signal circuit from the charge air cooler temperature sensor on bank 1, which is the sensor that measures the temperature of the compressed intake air after it leaves the intercooler. The computer interprets this high voltage as an out-of-range hot reading or an open circuit, so it flags the fault and may limit boost or adjust fueling to protect the engine.

SystemPowertrain
Code typeGeneric (all makes)
SeverityMedium
Fix difficultyIntermediate
AreaFuel and air metering and auxiliary emission controls

Symptoms you may notice

  • Illumination of the check engine light, often with no other noticeable symptoms
  • Reduced engine power or limp mode under acceleration if the computer defaults to a safe boost strategy
  • Poor fuel economy or rough running when the sensor reading is used for fuel and timing calculations
  • In rare cases, a brief stumble or hesitation on light throttle as the computer reacts to an erratic signal
  • No drivability change at all when the fault is intermittent and the signal returns to normal

Common causes, most likely first

  1. A failed charge air cooler temperature sensor that internally shorts or reads out of range
  2. An open or high-resistance wire in the sensor signal circuit between the sensor and the engine computer
  3. Corroded, loose, or pushed-back terminals at the sensor connector or the computer connector
  4. A short to voltage on the signal wire from chafing against a hot or moving component
  5. A faulty engine computer driver circuit, though this is far less common than wiring or sensor faults
  6. Moisture intrusion into the sensor connector causing intermittent high-voltage readings

How to diagnose and fix it

  1. Scan all modules and record freeze-frame data for P007D to confirm the fault was set under normal driving conditions
  2. Inspect the charge air cooler temperature sensor connector and the full wiring harness for corrosion, chafing, or loose pins
  3. Measure sensor resistance and compare it to the manufacturer's temperature-resistance chart while warming the sensor with a heat gun
  4. Back-probe the signal circuit at the sensor and at the computer to check for an open circuit or unwanted voltage drop
  5. Check for short-to-voltage on the signal wire with the sensor disconnected and the key on
  6. Replace the charge air cooler temperature sensor if wiring and connectors pass all tests
  7. Clear the code and perform a road test with live data to verify the sensor reading tracks actual charge air temperature

What a high charge air temp reading really means

  • A high voltage on this circuit usually means the sensor signal wire is open or the sensor has failed, not that the charge air is actually hot, so do not chase cooling system faults first.
  • Many technicians replace the charge air cooler temperature sensor only to find the real problem is a corroded pin in the connector that was disturbed during the repair, so always wiggle-test the harness while watching live data.
  • On some vehicles the charge air cooler temperature sensor is integrated into the boost pressure sensor or the intake air temperature sensor, so confirm the exact component location before ordering parts.
  • P007D can be set by a momentary voltage spike from a poor ground connection shared with other sensors, so check engine and chassis grounds before condemning the sensor.
  • The engine computer may substitute a default charge air temperature value when this code is active, which can mask drivability symptoms and make the fault seem intermittent.

Can I keep driving with P007D?

You can usually drive the vehicle with P007D because the computer substitutes a default temperature value, but avoid heavy throttle and towing until the fault is repaired since incorrect charge air temperature data can affect boost control and fuel economy. If the check engine light flashes or the engine enters limp mode, have it diagnosed promptly.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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