Circuit/System Testing

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

Verify that DTC P0237 or P0238 is not set.
- If a DTC is set
  Refer to DTC P0237 or P0238 .
- If none of the DTCs are set
Verify the conditions listed below do not exist:
- Loose clamps, cracks, or other damage in the air intake duct system
- Collapsed or restricted air intake duct system
- Restricted air filter
- Splits, kinks or improper connections at the vacuum hoses
- Missing, restricted or leaking exhaust components - Refer to Symptoms - Engine Exhaust .
- Vacuum leaks at the intake manifold and throttle body
- If a condition exists
  Repair as necessary.
- If none of the conditions exist
Replace the B111B turbocharger boost/intake air temperature sensor.