OBD-II Code
P0241
Severity
Not yet reviewed
Nobody on our side has assessed this code yet, so we are not going to guess at how serious it is.
Can you drive it
We cannot say
Treat it as unknown until a shop reads it with live data. If the check-engine light is FLASHING, stop driving as soon as it is safe to — that means an active misfire, whatever the code.
Indicative cost (USD)
$90–$1,800
From this code's diagnostic notes. Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
P0241 sets when the ECU reads the boost-pressure sensor 'B' (the secondary turbocharger boost sensor on twin-turbo or sequential-turbo engines, or the post-intercooler boost sensor on some single-turbo applications) and the signal is below its allowable range during a steady-state operating window where boost should be present.
How a shop works this
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed.
Note every code that is set, not just this one.
Codes that appear together usually narrow the cause faster than any one of them read alone.
Read the freeze frame — the conditions the fault was recorded under.
Cold or warm, idle or load, road speed and engine speed. A fault that only appears cold is a different fault from one that only appears under load, even with the same code on the scanner.
Confirm the fault is current rather than history.
Clear the code and see whether it returns under those same conditions. A code that does not come back may have been logged during a repair, a flat battery, or a bad connection that has since been disturbed.
Then follow the diagnostic notes further down this page, in the order they are written.
They are written in the order a shop works this code, cheapest checks first. Where they name a component, inspect its wiring and connector before replacing it.
If the code comes back after a repair, the underlying fault is still there. That is the point to bring in a scanner with live data and freeze-frame, or a shop that has one.
Common symptoms
- Check engine light
Read the full diagnostic procedureP0241 sets when the ECU reads the boost-pressure sensor 'B' (the secondary turbocharger boost sensor on twin-turbo or sequential-turbo engines, or th…
P0241 sets when the ECU reads the boost-pressure sensor 'B' (the secondary turbocharger boost sensor on twin-turbo or sequential-turbo engines, or the post-intercooler boost sensor on some single-turbo applications) and the signal is below its allowable range during a steady-state operating window where boost should be present. The 'B' designation matters: on twin-turbo V-engines, sensor A is bank 1 and sensor B is bank 2, so P0241 is bank-2 specific; on single-turbo applications, 'B' is the second pressure-measurement point in the intake tract.
Cheapest-first ladder
- Inspect intake/charge piping for blown couplers, cracked silicone hoses, or a popped-off boost reference line at the sensor - a pressure drop at the sensor location with the rest of the system healthy reads exactly as P0241 'low input.'
- DMM the sensor's 5V reference, ground, and signal wires with KOEO - 5V reference dead means the ECU side or harness is open; reference good but signal stuck near zero means the sensor itself is dead.
- Check for an exhaust leak ahead of the bank-2 turbo or a stuck wastegate that's bleeding boost off bank 2 before it reaches the sensor - on twin-turbo platforms a partial wastegate failure looks like a sensor fault until you scope actuator position. Expensive-misdiagnosis trap: condemning a turbocharger when the real fault is a $25 silicone coupler or a $90 sensor.
Vehicle-specific patterns2007-2010 BMW N54 (335i, 535i, 135i) twin-turbo I6 throws P0241 from a cracked or oil-soaked charge-pipe coupler between the turbos and the intercool…
- 2007-2010BMW N54 (335i, 535i, 135i) twin-turbo I6 throws P0241 from a cracked or oil-soaked charge-pipe coupler between the turbos and the intercooler - BMW issued multiple TSBs around upgraded charge pipes and intercooler hoses on this platform.
- 2011-2016BMW N63 / S63 twin-turbo V8 (550i, 750i, X5/X6 50i, M5/M6) throws P0241 from boost-pressure sensor B failure on bank 2 along with the well-known coil/injector cluster of N63 issues.
- 2014-2018Ford F-150 3.5L EcoBoost twin-turbo throws P0241 from a cracked PCV hose or intercooler tube on the passenger side that bleeds boost off the bank-2 turbo.
- 2008-2014Audi/VW 2.0T (CCTA, CBFA, CAEB) with the K03 single-turbo can throw P0241 referencing the secondary intake-tract pressure sensor when the diverter valve diaphragm tears and lets boost vent.
Estimated repair$90 to $1,800
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