C0550 on CHEVROLET MALIBU — Vacuum Sensor B Circuit High

Q: "What does C0550 mean on a CHEVROLET MALIBU?"

"C0550 indicates: Vacuum Sensor B Circuit High. This is a chassis code. 2 CHEVROLET MALIBU owners have reported this to NHTSA."

Q: "What are the most common causes of C0550 on CHEVROLET MALIBU?"

"Based on 2 NHTSA reports, the most commonly cited components are: Steering. These percentages are based on the component field in owner complaints."

Q: "Is C0550 serious on my CHEVROLET MALIBU?"

"Of 2 NHTSA reports for this code on CHEVROLET MALIBU, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my CHEVROLET MALIBU shows C0550?"

"1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare."

What C0550 Means on Your CHEVROLET MALIBU

C0550 is a diagnostic trouble code indicating: Vacuum Sensor B Circuit High. This code relates to the chassis system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

2 CHEVROLET MALIBU owners have reported this issue to NHTSA across model years 2006. Most reports come from the 2006 model year. The most commonly reported component is Steering (100.0% of reports).

Real CHEVROLET MALIBU Owner Reports

Source: NHTSA Complaints Database

"Sudden failure of power steering while driving. gm dealership ran diagnostic test. diagnosis is steering assist motor is shorting internally and shutting down the assist. occasionally, the computer will successfully reset and power steering will be restored for a short while until it happens again."

— 2006 CHEVROLET MALIBU owner · STEERING · Filed 08/09/2019

"Loss of steering control while driving on expressway at 50+mph. difficult to maintain control. able to slow down and exit freeway. dealer was close by so left on lot overnight. check engine light also had come on. dealer reported found code c0550 when running diagnostics."

— 2006 CHEVROLET MALIBU owner · STEERING · Filed 12/23/2014

All reports filed by vehicle owners directly with the U.S. Department of Transportation.

📊 Complaint Trend by Model Year

2

'06

Common Causes on CHEVROLET MALIBU

Based on NHTSA complaint component analysis for this vehicle.

STEERING 100%

What To Do Next

1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50–$150) pinpoints the root cause before you spend money on parts.
3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.

Frequently Asked Questions

What does C0550 mean on a CHEVROLET MALIBU? ▾

C0550 indicates: Vacuum Sensor B Circuit High. This is a chassis code. 2 CHEVROLET MALIBU owners have reported this to NHTSA.

What are the most common causes of C0550 on CHEVROLET MALIBU? ▾

Based on 2 NHTSA reports, the most commonly cited components are: Steering. These percentages are based on the component field in owner complaints.

Is C0550 serious on my CHEVROLET MALIBU? ▾

Of 2 NHTSA reports for this code on CHEVROLET MALIBU, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my CHEVROLET MALIBU shows C0550? ▾

1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare.

C0550 on Other Vehicles

→ All codes reported on CHEVROLET MALIBU