Fuel and air

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

Severity: medium Drive with care, to a shop

What P007B means

The engine control unit found that the Bank 1 charge air cooler temperature sensor signal is outside its expected range or does not behave plausibly. The sensor sits in the boost air path and tells the ECU how hot the air is after the turbo and intercooler. The ECU uses this to adjust boost, fueling and spark timing.

Symptoms

  • Check Engine Light on
  • Hesitation or reduced power
  • Worse fuel economy
  • Limp mode with limited boost
  • Possible increase in emissions

Possible causes

  1. Failed charge air temperature sensor
  2. Damaged, shorted, open or corroded wiring or connector
  3. Intercooler or boost pipe leaks, or restrictions in the air path
  4. Sensor contaminated with oil or soot
  5. Rarely, a faulty ECU

How to diagnose

  1. Scan for codes and freeze frame data, and look for other boost or air temperature codes
  2. Inspect the sensor connector and harness for damage, moisture and corrosion
  3. On a cold engine, compare the sensor reading with ambient and intake air temperature
  4. Measure sensor resistance and compare to the manufacturer spec
  5. Check reference voltage and ground at the sensor connector
  6. Inspect the intercooler, hoses and clamps for oil residue and leaks, and pressure test if needed
  7. Watch the sensor reading on a road test under load

Common fixes

  • Replace the charge air temperature sensor
  • Repair or replace the wiring and connector
  • Fix intercooler or boost pipe leaks or restrictions
  • Update software or replace the ECU if everything else checks out

Questions and answers

What does P007B mean?

The Bank 1 intercooler temperature sensor signal is out of range or doesn't make sense to the ECU. The sensor or its wiring is the usual culprit.

Can I drive with P007B?

Briefly and carefully, yes, but the car may go into limp mode with less power. Get it diagnosed soon.

How do I fix P007B?

Check the connector and wiring, the sensor's resistance, and the boost system for leaks. Replacing the sensor often solves it.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.