P0236
Turbocharger/Supercharger Boost Sensor A Circuit Range/Performance
Turbo/supercharger boost
Generic OBD-II
High
What it means
P0236 means the turbo or supercharger boost pressure sensor "A" is reading a value the ECM considers out of range or inconsistent with other inputs. It can stem from the sensor itself or from a real boost/intake leak. Because boost control depends on this signal, the engine often runs in reduced-power mode until the fault is fixed.
High
Can I keep driving? Drivable but often in reduced-power mode — the ECM may limit boost to protect the engine, so expect sluggish acceleration until repaired.
Common symptoms
What you'll notice
- Check-engine light on
- Reduced power or 'limp mode' with limited boost
- Hesitation or stumble during acceleration
- Poor throttle response under load
Common causes
Most likely first
- Faulty turbo/supercharger boost pressure sensor (reading implausible or out of range)Likely
- Boost/vacuum or intake leak causing pressure that disagrees with the sensorCommon
- Damaged or corroded wiring/connector at the boost sensorCommon
- Faulty engine control module (ECM) — least commonLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and compare the boost sensor reading to actual manifold/barometric pressure with a scan tool.
- Inspect intake and charge-air plumbing for boost or vacuum leaks.
- Check the sensor connector and wiring for damage, then test the sensor's signal against spec.
- Replace the boost sensor if out of range; if all else checks out, have the ECM evaluated. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0236?+
Short term yes, but expect reduced power. The ECM often caps boost as a safeguard, so repair it before extended or hard driving.
Can I just clear P0236?+
It clears, but a range/performance fault returns once the sensor reading is judged implausible again. Diagnose the sensor and plumbing first.
Related codes
Often seen with P0236
Read & clear P0236 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