P024A code meaning
Charge Air Cooler Bypass Control A Range/Performance
Powertrain system Generic code P02xx codes Check engine light
What P024A means
The charge air cooler bypass is a flap or valve that routes compressed air around the charge air cooler, so the engine and exhaust warm up faster after a cold start; when warm it closes or opens partly to control intake air temperature. It is driven by an electric motor with a built-in position sensor or by a solenoid and vacuum can. P024A is the functional fault: the bypass does not follow its command, judged from the position sensor or from the expected temperature effect – Bosch describes comparing the cooler's efficiency with the valve closed and open, using modelled air temperature before and measured temperature after the cooler. FCA documents P024A, together with P026E, on the 2017 Alfa Romeo Giulia and 2018 Stelvio with the 2.0 turbo and fixed it with an engine software update, so check the software level first.
P024A at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 2.5 hours
- Clears after repairAfter a drive cycle
Symptoms of P024A
- Check engine light on
- Longer warm-up or higher charge air temperature
- Possibly less power from boost limitation
Common causes of P024A
- Most likelyBypass flap sticking, coked or oily (oil from crankcase ventilation or turbo)
- PossibleActuator weak or vacuum line leaking
- PossibleEngine software (FCA 2.0 turbo)
- Less likelyPosition sensor inaccurate or connector corroded
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Charge air cooler bypass actuator aActuator wiringEngine control moduleCharge air cooler
What each part of P024A means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 2 | Area: fuel and air metering (injector circuit). |
| 4A | The exact fault in that area. |
What to do next
- Note P024A and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P024A
What does P024A mean?
P024A means "Charge Air Cooler Bypass Control A Range/Performance". The charge air cooler bypass is a flap or valve that routes compressed air around the charge air cooler, so the engine and exhaust warm up faster after a cold start; when warm it closes or opens partly to control intake air temperature. It is a generic code, so it means the same on every make.
Is it safe to drive with P024A?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P024A fail an emissions test?
Yes, it can. P024A is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P024A to fix?
Difficulty: medium. A typical repair takes 0.3 to 2.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P024A clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.