P0452 on FORD FOCUS — EVAP System Pressure Sensor/Switch A Circuit Low

Q: "What does P0452 mean on a FORD FOCUS?"

"P0452 indicates: EVAP System Pressure Sensor/Switch A Circuit Low. This is a emission controls code. 2 FORD FOCUS owners have reported this to NHTSA."

Q: "What are the most common causes of P0452 on FORD FOCUS?"

"Based on 2 NHTSA reports, the most commonly cited components are: Power Train,Fuel/Propulsion System, Engine,Fuel/Propulsion System. These percentages are based on the component field in owner complaints."

Q: "Is P0452 serious on my FORD FOCUS?"

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

Q: "What should I do if my FORD FOCUS shows P0452?"

"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 P0452 Means on Your FORD FOCUS

P0452 is a diagnostic trouble code indicating: EVAP System Pressure Sensor/Switch A Circuit Low. This code relates to the emission controls system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

2 FORD FOCUS owners have reported this issue to NHTSA across model years 2013-2016. Most reports come from the 2013, 2016 model years. The most commonly reported component is Power Train,Fuel/Propulsion System (50.0% of reports).

Real FORD FOCUS Owner Reports

Source: NHTSA Complaints Database

"Check engine light came on Saturday morning on my way to work, When checked it comes up as fault codes P0420, with secondary codes of P144A - EVAP Emission System Purge Vapor Line Restricted/blocked, P1450 - Unable to bleed up fuel tank vacuum, and P0131 - O2 Circuit Low Voltage (Bank 1, Sensor 1),"

— 2013 FORD FOCUS owner · POWER TRAIN,FUEL/PROPULSION SYSTEM · Filed 12/11/2021

"A stuck CPV is leading to excessive vacuum in the fuel vapor system, causing the plastic fuel tank to deform, resulting in an inaccurate or erratic fuel gauge indication, inaccurate distance to empty (DTE), and/or other drivability concerns."

— 2016 FORD FOCUS owner · ENGINE,FUEL/PROPULSION SYSTEM · Filed 07/22/2021

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

📊 Complaint Trend by Model Year

1

'13

1

'16

Common Causes on FORD FOCUS

Based on NHTSA complaint component analysis for this vehicle.

POWER TRAIN,FUEL/PROPULSION SYSTEM 50%

ENGINE,FUEL/PROPULSION SYSTEM 50%

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 P0452 mean on a FORD FOCUS? ▾

P0452 indicates: EVAP System Pressure Sensor/Switch A Circuit Low. This is a emission controls code. 2 FORD FOCUS owners have reported this to NHTSA.

What are the most common causes of P0452 on FORD FOCUS? ▾

Based on 2 NHTSA reports, the most commonly cited components are: Power Train,Fuel/Propulsion System, Engine,Fuel/Propulsion System. These percentages are based on the component field in owner complaints.

Is P0452 serious on my FORD FOCUS? ▾

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

What should I do if my FORD FOCUS shows P0452? ▾

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.

P0452 on Other Vehicles

→ All codes reported on FORD FOCUS