P0471: Exhaust Pressure Sensor Range/Performance
The exhaust back pressure sensor reading doesn't make sense.
Green, yellow, red: three ways P0471 can look
The same code can be a quick fix or a reason to pull over. Match your situation to the closest example.
Keep an eye on it
Set once.
Schedule a repair
Power loss or returns. Repair soon.
Stop and get help
Derate. Get it fixed.
Symptoms you might notice
- Check engine light
- Possible power loss
Common causes, cheapest first
- Plugged or cracked sensor tube
- Failed sensor
- Exhaust restriction
What you can check before calling
- Inspect the sensor tube
A code points to a system, not a part. Replacing parts based on the code alone is how people spend money without fixing the problem. Testing confirms the cause first.
Generic codes (second character 0) mean the same thing on every vehicle. Some manufacturers add their own details, so check service information for your exact vehicle.
More diesel & cummins codes
- P2002
Diesel Particulate Filter Efficiency Below Threshold (Bank 1) - P2463
Diesel Particulate Filter Restriction - Soot Accumulation - P242F
Diesel Particulate Filter Restriction - Ash Accumulation - P2459
Diesel Particulate Filter Regeneration Frequency - P2453
Diesel Particulate Filter Pressure Sensor A Circuit Range/Performance - P2454
Diesel Particulate Filter Pressure Sensor A Circuit Low
Look up another code
Cummins fault code (like 1922), J1939 SPN and FMI (like SPN 3251 FMI 0), or an OBD-II code (like P0420).
Questions
What does P0471 mean?
P0471 means "Exhaust Pressure Sensor Range/Performance". The exhaust back pressure sensor reading doesn't make sense.
Can I drive with code P0471?
It depends on what the vehicle is doing. Green: Set once. Yellow: Power loss or returns. Repair soon. Red: Derate. Get it fixed.
What causes P0471?
The most common causes are: plugged or cracked sensor tube; failed sensor; exhaust restriction.
Is P0471 a serious code?
It can be. Derate. Get it fixed.
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