P25DC: Fuel Level Sensor C Stuck
The third fuel level sensor reads a constant value across known consumption or refuelling events. Float arm or resistor wiper is mechanically stuck.
What P25DC means
P25DC is a generic OBD-II powertrain code in the fuel & air group. In plain English: the part isn’t responding the way the computer expects when it is commanded.
- Check engine light
- Usually on
- Emissions-related
- No
- Limp mode possible
- Not typical
- Drive cycle to clear
- Not required
Get it fixed
Post this code once and get quotes from local mechanics. Free to post.
Makes the repair and parts links below specific to your car. Kept in this browser only.
Common causes
- 01Float arm jammed against tank wall, baffle or pump moduleMost likely
- 02Resistor wiper seized by varnish from old fuelPossible
Can I drive with P25DC?
Usually yes, for a short time.
The car will often drive normally, but get it diagnosed soon. If you notice rough running, warning lights flashing, overheating or a burning smell, stop driving.
Why we rate it moderate
- Turns on the check engine light
Severity is our rule-based rating from the code’s flags in OBDex and the system it affects, not an inspection of your car. If the check engine light is flashing, or you notice overheating, low oil pressure, or brake or steering problems, stop driving and get help.
How to diagnose P25DC
- 1
Confirm the code and save freeze-frame data
Read the codes with an OBD-II scan tool and note every code, not just P25DC. Save the freeze-frame data (speed, load, temperature when the fault set) before clearing anything; it tells you when the fault happens.
- 2
Check for related codes first
Look for P25B1, P25B0. Related codes often share a cause; a circuit or sensor code usually needs fixing before a performance code like this one.
- 3
Check live data
Watch the related sensor and actuator readings in live data (Fuel level sensor C, Fuel tank) and compare them with expected values in the service information for your vehicle.
- 4
Test the likely causes in order
Start with the most likely cause and work down: Float arm jammed against tank wall, baffle or pump module; resistor wiper seized by varnish from old fuel. Test before replacing parts.
- 5
Check for recalls and service bulletins
Look up recalls for your exact vehicle with its VIN, and ask a dealer about technical service bulletins (TSBs). Manufacturers sometimes issue software updates or extended warranties for known faults.
- 6
Clear the code and verify the repair
After the repair, clear the code and drive the car under the conditions in the freeze-frame data to confirm it does not return.
P25DC repair cost estimate
Estimate, not a quote. Labor times are typical ranges for this code from OBDex, and $125/hr is an assumed rate. Shop rates and labor times vary by vehicle and region. Diagnosis time may be billed separately.
- DIY difficulty
- Hard
- Good DIY job?
- Yes, with a scan tool
Involved testing or major parts. Most owners use a shop.
Parts and systems involved
- Fuel level sensor C
- Fuel tank
P25DC FAQ
What does P25DC mean?
P25DC means “Fuel Level Sensor C Stuck”. The third fuel level sensor reads a constant value across known consumption or refuelling events. Float arm or resistor wiper is mechanically stuck.
Is P25DC serious? Can I keep driving?
We rate P25DC as moderate severity. Usually yes, for a short time. The car will often drive normally, but get it diagnosed soon. If you notice rough running, warning lights flashing, overheating or a burning smell, stop driving.
What causes P25DC?
The most common causes, from most to least likely: Float arm jammed against tank wall, baffle or pump module; Resistor wiper seized by varnish from old fuel. Test before replacing parts, because several causes can set the same code.
How much does it cost to fix P25DC?
Typical labor is about $190–$500 at an assumed $125/hour shop rate, plus parts. That is an estimate, not a quote: labor times and rates vary by vehicle and region, and diagnosis may be billed separately.
Can I fix P25DC myself?
DIY difficulty is hard. Many owners can handle it with a scan tool, a multimeter and basic hand tools. Always confirm the cause before buying parts.
Will P25DC clear itself?
If the fault was intermittent, the warning may go off once the computer stops seeing it, but the code stays in memory. Fix the cause; clearing the code alone doesn’t repair anything.