OBD-II code · Powertrain (generic)
P026A Charge Air Cooler Efficiency Below Threshold
Charge air cooler efficiency dropped below diagnostic threshold — intake air not cooled enough after compression. Risk of knock and loss of power.
Is it safe to drive with P026A?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyIntercooler airflow blocked or core damaged
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 1–5 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Intercooler, Cac Coolant Pump
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.