P026A
Charge Air Cooler Efficiency Below Threshold
Generic OBD-II
Real-world scan data
Seen in
89
scans in the past year
Found in
<0.1%
of scans
<0.1%
of scans that found faults
Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.
Common symptoms
What you'll notice
- Check for any leaks or cracks in the charge air cooler system and repair them if found.
- Inspect and clean the charge air cooler intercooler fins to ensure proper airflow.
- Verify the functionality of the charge air cooler sensor and replace it if necessary.
- Check for any blockages in the charge air cooler system and remove them.
- Perform a software update or reflash the engine control unit to address any potential calibration issues related to charge air cooler efficiency.
Common causes
Most likely first
- Intercooler is clogged or leaking
- Turbocharger is faulty or damaged
- Air intake system is restricted or blocked
- Boost pressure sensor is malfunctioning
- Exhaust gas recirculation (EGR) valve is stuck open or malfunctioning
How to diagnose & fix
Work through it in order
- Decreased engine performance and power
- Reduced fuel efficiency
- Higher than normal exhaust emissions
- Engine overheating
- Engine misfires or stalls
Read & clear P026A yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.