P026A — Charge Air Cooler Efficiency Below Threshold

P026A: Charge Air Cooler Efficiency Below Threshold — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

Charge Air Cooler Efficiency Below Threshold. Basic catalogue definition; diagnostic details have not yet been reviewed.

Affected system: Powertrain

Symptoms

  • Reduced acceleration, a warning light or limited engine power may occur.

Possible causes

  • A restricted charge-air cooler, intake leaks or inaccurate intake-temperature readings may reduce cooling effectiveness.

What to check

  • Check related codes, charge-air hoses and cooler airflow; compare intake-temperature readings and test for leaks using the vehicle procedure.

Also written as: P026A-00, P026A00, PO26A (some scan tools add the fault-type byte, e.g. -00).