P0340 on FORD FOCUS — Camshaft Position Sensor A Circuit Bank 1 or Single Sensor

Q: "What does P0340 mean on a FORD FOCUS?"

"P0340 indicates: Camshaft Position Sensor A Circuit Bank 1 or Single Sensor. This is a ignition system code. 2 FORD FOCUS owners have reported this to NHTSA."

Q: "What are the most common causes of P0340 on FORD FOCUS?"

"Based on 2 NHTSA reports, the most commonly cited components are: Electrical System,Unknown Or Other,Engine, Engine. These percentages are based on the component field in owner complaints."

Q: "Is P0340 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 P0340?"

"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 P0340 Means on Your FORD FOCUS

P0340 is a diagnostic trouble code indicating: Camshaft Position Sensor A Circuit Bank 1 or Single Sensor. This code relates to the ignition system 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 2016-2017. Most reports come from the 2016, 2017 model years. The most commonly reported component is Electrical System,Unknown Or Other,Engine (50.0% of reports).

Real FORD FOCUS Owner Reports

Source: NHTSA Complaints Database

"Just filled my gas tank up then as i left the gas station got about 1 mile up the road then while sitting at a stoplight i turned the ac on and idle dipped, car felt like it was going to die(which it did) then as i tried to re-start, cel came on and car would not start."

— 2016 FORD FOCUS owner · ELECTRICAL SYSTEM,UNKNOWN OR OTHER,ENGINE · Filed 10/07/2017

"Driving car , check engine light came on at 5800 mile, scan tool stated code p0340 and p0344, replace cam sensor."

— 2017 FORD FOCUS owner · ENGINE · Filed 01/24/2018

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

📊 Complaint Trend by Model Year

1

'16

1

'17

Common Causes on FORD FOCUS

Based on NHTSA complaint component analysis for this vehicle.

ELECTRICAL SYSTEM,UNKNOWN or OTHER,ENGINE 50%

ENGINE 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 P0340 mean on a FORD FOCUS? ▾

P0340 indicates: Camshaft Position Sensor A Circuit Bank 1 or Single Sensor. This is a ignition system code. 2 FORD FOCUS owners have reported this to NHTSA.

What are the most common causes of P0340 on FORD FOCUS? ▾

Based on 2 NHTSA reports, the most commonly cited components are: Electrical System,Unknown Or Other,Engine, Engine. These percentages are based on the component field in owner complaints.

Is P0340 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 P0340? ▾

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.