P0237 — Turbocharger Boost Sensor A Circuit Range/Performance
Drive with caution — fix soon.
What P0237 means
This code means the turbocharger boost sensor (sensor A) is reading a pressure that doesn't make sense for the current engine conditions. It often points to a faulty boost sensor, a boost leak, a clogged sensor hose, or wiring problems. It's a common turbo-related code and is usually fixable without major engine work, often by cleaning or replacing the sensor.
Common symptoms
- Check engine light is on
- Noticeable loss of power or sluggish acceleration
- Engine may go into reduced-power (limp) mode
- Poor fuel economy
- Hesitation or surging under acceleration
Common causes
- Faulty turbocharger boost pressure sensor
- Boost leak in the intake or turbo plumbing
- Clogged or cracked sensor vacuum/pressure hose
- Damaged wiring or poor connector contact at the sensor
- Actual turbocharger underboost or overboost condition
Typical repair cost
$100 – $400
Varies by vehicle and root cause.
Frequently asked questions
Can I keep driving with a P0237 code?
For short trips, usually yes, but take it easy on the throttle. The car may feel weak because it limits power to protect the turbo, so avoid hard acceleration and towing and get it diagnosed soon.
How much does it cost to fix a P0237 code?
Most repairs land between $100 and $400. If it's just the boost sensor or a hose, it's on the lower end; tracking down a boost leak or wiring fault can push it higher.
Is a P0237 code serious?
It's moderate. It won't usually leave you stranded right away, but ignoring it can lead to lost power and potential turbo or engine strain, so don't let it linger.
What is the boost sensor and why does it matter?
The boost sensor tells the computer how much pressure the turbo is making. If its reading is off, the engine can't manage fuel and boost correctly, which hurts power and efficiency.