P024A
Charge Air Cooler Bypass Control A Range/Performance
Turbo / boost & charge-air cooling
Generic OBD-II
Low
What it means
P024A means the charge-air-cooler (intercooler) bypass control 'A' isn't performing within its expected range — the module commands the bypass valve to a position but the feedback doesn't match. This bypass manages how much intake air is routed around the cooler to regulate charge temperature, so a fault mainly affects efficiency and performance rather than leaving you stranded.
Low
Can I keep driving? Usually safe to keep driving — it affects intake-air temperature control, so you may notice slightly reduced efficiency or performance rather than a breakdown.
Common symptoms
What you'll notice
- Check-engine light on
- Slightly reduced performance or fuel economy
- Poor cold-weather warm-up behavior (if the bypass is meant to warm intake air)
- Often no noticeable driving symptom
Common causes
Most likely first
- Charge-air-cooler bypass valve or flap sticking, binding, or seizedLikely
- Carbon or soot buildup restricting valve travelCommon
- Faulty bypass actuator or control motorCommon
- Damaged wiring or a poor connector at the bypass actuatorLess often
- Control-circuit fault preventing the valve from reaching its commanded positionLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and note the commanded versus actual bypass position.
- Inspect the charge-air-cooler bypass valve/flap for binding, carbon buildup, or seizing.
- Check the actuator and its wiring/connector for damage or corrosion.
- Command the actuator with a scan tool and confirm it moves through its full range.
- Replace the actuator or bypass valve if it fails to respond, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P024A?+
Generally yes. This is a low-severity performance code affecting intake-air temperature control, not a fault that strands you. Still, get it repaired to restore efficiency.
Can I just clear P024A?+
It will return if the bypass valve or actuator still can't reach its commanded position. The mechanical or electrical cause needs fixing.
Related codes
Often seen with P024A
Read & clear P024A yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX