C0045 — Brake Pressure Sensor B

What Does C0045 Mean?

C0045 is a diagnostic trouble code indicating: Brake Pressure Sensor B. This code relates to the chassis system. It has been reported in NHTSA complaints across 3 different vehicle models.

Symptoms of C0045

⚠️ Traction control system activated

Common Causes

🔍 Sensor or control module malfunction

C0045 Reports by Year

2017

1

2021

1

2010

1

Real Owner Reports

From NHTSA complaint database — actual owner descriptions.

"SERVICE STABILITRAK SYSTEM WARNING MESSAGE APPEARS WITH ASSOCIATED ABS AND TRACTION CONTROL LIGHTS. OCCURRING RANDOMLY, THOUGH SEEMINGLY ASSOCIATED WITH WEIGHT IN THE REAR CARGO AREA OF THE VEHICLE AND WHEN HITTING LARGER BUMPS IN THE ROAD WHILE HIGHWAY AND CITY DRIVING, THE LIGHTS WILL ILLUMINATE W"
— Chevrolet Equinox owner, 08/01/2017

"SUBARU OUTBACK 2010 WITH CVT TRANSMISSION BOUGHT NEW. NUMEROUS FAILURES. THE TRANSMISSION FIRST FAILED DUE TO A SOLENOID OPEN CIRCUIT THAT DISABLED THE CAR. CODE P2762 ( LAST WEEK IN MARCH, ABOUT 2,600 MILES). THAT WAS FIXED. AFTER THIS EVENT THE TRANSMISSION WOULD ON OCCASION DISENGAGE WHILE STILL "
— Subaru Outback owner, 07/24/2010

"THE FUEL GAUGE READS INCORRECTLY AND WHEN THIS HAPPENS THE TRACTION CONTROL LIGHT COMES ON. THERE HAVE 2 2EA FUEL LEVEL SENSORS INSTALLED WITH NO LUCK IN KEEPING THE CHECK WILL RETURN. THE ARE CODES P0463, P069E AND C0045."
— Chevrolet Traverse owner, 03/08/2021

Source: NHTSA Complaints Database

Most Reported Vehicles for C0045

Based on NHTSA owner complaint data.

#	Vehicle	Reports
1	CHEVROLET EQUINOX
2	CHEVROLET TRAVERSE
3	SUBARU OUTBACK

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.

C0045: Brake Pressure Sensor B