P0238 — Turbocharger/Supercharger Boost Sensor A Circuit High

What Does P0238 Mean?

P0238 is a diagnostic trouble code indicating: Turbocharger/Supercharger Boost Sensor A Circuit High. This code relates to the fuel injection system. It has been reported in NHTSA complaints across 1 different vehicle models.

Symptoms of P0238

⚠️ Engine misfires

Common Causes

🔍 Turbocharger or boost system issue
🔍 Sensor or control module malfunction

Real Owner Reports

From NHTSA complaint database — actual owner descriptions.

"P0236 , p0238, p007d, p0456, charged air sensor A fault, boost sensor range/performance fault, and other faults , crank car engine service now pops up everytime, clear codes pops rite back up, car stumbles ,misfires , no boost, no throttle shuts off . Only had this car a week . Performed wire splice"
— Ford Focus owner, 09/17/2024

Source: NHTSA Complaints Database

Most Reported Vehicles for P0238

Based on NHTSA owner complaint data.

#	Vehicle	Reports
1	FORD FOCUS

Frequently Asked Questions

Can I drive with this code?

It depends on the severity. If the vehicle runs normally, short trips are usually OK. If you notice performance issues, drivability problems, or warning lights beyond the check engine light, get it checked soon.

Will this code clear itself?

Some codes clear automatically after the underlying issue is fixed and several drive cycles pass. But the root cause must be addressed first.

How do I find the exact cause?

A code alone doesn't pinpoint the failed part. You need a diagnostic scan ($50-150 at most shops) that reads freeze frame data and live sensor readings to identify the specific component.

What To Do Next

Possible Fixes

🔧 Have the code scanned with a professional-grade scanner to read freeze frame data
🔧 Test the relevant sensor(s) with a multimeter before replacing
🔧 If DIY repair isn't feasible, get a diagnostic from a trusted mechanic ($50-150)

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P0238: Turbocharger/Supercharger Boost Sensor A Circuit High