P0237
Turbocharger/Supercharger Boost Sensor A Circuit Low
Turbo / boost control
Generic OBD-II
High
What it means
P0237 means the turbo/supercharger boost-pressure sensor A is reporting a voltage below its normal range — usually a short to ground, an open, or a failed sensor. With no trustworthy boost reading, the ECM typically limits boost and cuts power to protect the engine.
High
Can I keep driving? Usually driveable, but expect reduced power as the ECM limits boost until the sensor circuit is fixed.
Common symptoms
What you'll notice
- Check-engine light on
- Noticeable loss of power or reduced boost
- Hesitation or surging under acceleration
- Reduced fuel efficiency
Common causes
Most likely first
- Short to ground or open in the boost-sensor signal wiringLikely
- Failed boost-pressure sensorCommon
- Corroded or loose sensor connectorCommon
- Rarely, a failed ECMLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame and inspect the boost-sensor connector and wiring for a short to ground or an open.
- Check the sensor's 5V reference and ground, then compare the signal voltage to spec at key-on and under boost.
- Replace the boost-pressure sensor if reference and ground are good but the signal stays low.
- Repair any damaged wiring, then clear and road-test.
FAQ
Quick answers
Is it safe to drive with P0237?+
You can usually drive, but the engine will likely be in reduced-boost/limp mode with noticeably less power. Fix it soon to restore performance and rule out boost-control problems.
Can I just clear P0237?+
It clears, but a short or failed sensor sets it again quickly and boost stays limited until the circuit is repaired.
Related codes
Often seen with P0237
Read & clear P0237 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