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P0238 — Turbocharger Boost Sensor A Circuit High
CautionTurbo/BoostLimp to the next safe stop
Seen on: Heavy Truck
Turbocharger Boost Sensor A Circuit High. Common causes: Open circuit or 5V short.
Don't risk it — get a diesel tech on the truck.
Your code rides along, so nearby mechanics see the fault before they quote you.
How serious is it?
Caution. Limp to the next safe stop.
Most likely causes
- Open circuit or 5V short
- Faulty sensor
First moves (roadside)
- Check sensor signal does not exceed 4.8V
- replace sensor if needed
FAQ
What does P0238 mean?
Turbocharger Boost Sensor A Circuit High. Common causes: Open circuit or 5V short.
How serious is P0238?
Caution — Limp to the next safe stop.
What's the most likely cause of P0238?
The most common cause is: Open circuit or 5V short. Other possibilities include Faulty sensor.
Can I keep driving with P0238?
Limp to the next safe stop. When in doubt, get a qualified mobile diesel tech on the truck before continuing.
Throwing this code right now?
Find a mechanic or related guides
General diagnostic guidance for diesel engines (Cummins, Detroit, PACCAR, Volvo, Mack and more). Not a substitute for a scan-tool diagnosis on your specific truck.