Exhaust Pressure Sensor Circuit
The P0470 code means the vehicle's onboard diagnostic system has detected: Exhaust Pressure Sensor Circuit. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- moderate
- Estimated cost
- $80 - $400 (parts and labor)
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Common Symptoms
- Check Engine Light on
- Reduced engine performance
- Turbo may not function correctly
- Possible DPF regeneration issues on diesel
Probable Causes (Ranked by Likelihood)
- Faulty exhaust pressure sensor Very High
- Clogged exhaust pressure sensor hose High
- Damaged wiring or connector Moderate
- PCM circuit fault Low
Step-by-Step Diagnostic Procedure
-
Read exhaust pressure sensor PID on scan tool. At key-on engine-off, it should read near atmospheric pressure.
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Locate the exhaust pressure sensor and inspect the pressure hose for blockage with soot or carbon.
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Check sensor connector for heat damage or corrosion.
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Measure sensor output voltage and compare to spec.
Frequently Asked Questions
What does the exhaust pressure sensor measure?
It measures exhaust back pressure, which is critical for diesel particulate filter (DPF) monitoring and turbo efficiency calculations.
Is P0470 a diesel-only code?
Primarily yes, though some turbocharged gasoline engines also use exhaust pressure sensors for turbo control.
Can a clogged DPF cause P0470?
A clogged DPF causes high exhaust pressure, which is a normal reading. P0470 indicates a problem with the sensor circuit, not the pressure level itself.
Sources
This page is built from documented references. Verify against your own service info before repair work.
P0470 on Diesel, EV & Equipment
The same code ID appears across other engines and platforms. The diagnostic flow varies by manufacturer — these are the platform-specific breakdowns:
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