What does P0470 mean?
The exhaust back pressure sensor measures pressure in the exhaust manifold on many diesels. The computer uses it for EGR and turbo control.
The computer has detected an electrical fault in the sensor circuit.
Codes are a starting point. They tell you which test failed, not which part to replace. Check for other stored codes and fix those in a sensible order.
Symptoms
- Check engine light
- Reduced power
- Turbo or EGR related drivability issues
Common causes
- Open or shorted wiring
- Corroded or loose connector
- Failed sensor
- Blown fuse or reference voltage issue shared with other sensors
How to diagnose P0470
- Look for other codes that share the same 5 V reference circuit.
- Inspect the connector and wiring, then check reference, ground and signal voltages.
- Replace the sensor only after the wiring tests good.
- Key on, engine off, the reading should match barometric pressure.
- Remove and clear the sensor tube.
How to fix it
- Clean the sensor tube
- Replace the sensor
- Repair wiring
Estimated repair cost
Likely repairs for P0470 run from about $100 to $350, depending on the cause.
| Repair | Typical range (parts + labor) |
|---|---|
| Diagnostic fee (scan + testing) | $100 - $200 |
| Exhaust back pressure sensor | $100 - $350 |
These are rough US estimates for an independent shop in 2026, based on typical parts prices and standard labor times. Dealers, big trucks, luxury brands and high-cost areas often run higher. They are not quotes. Use the repair cost estimator to adjust for your vehicle.
How serious is P0470?
Moderate severity
Usually drivable, possibly with reduced power.
P0470 FAQ
What does P0470 mean?
P0470 stands for "Exhaust Pressure Sensor "A" Circuit (Bank 1)". The exhaust back pressure sensor measures pressure in the exhaust manifold on many diesels.
Can I drive with a P0470 code?
Usually drivable, possibly with reduced power.
How much does it cost to fix P0470?
It depends on the cause. The likely repairs for P0470 range from about $100 to $350 at an independent shop in the US, plus a diagnostic fee of roughly $100-$200. These are rough estimates; dealer prices and some vehicles run higher.
What is the most common cause of P0470?
The most common causes are: open or shorted wiring; corroded or loose connector; failed sensor.