Exhaust Pressure Sensor Circuit Low
The P0472 code means the vehicle's onboard diagnostic system has detected: Exhaust Pressure Sensor Circuit Low. 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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What Are the Symptoms of P0472?
- Check Engine Light on
- DPF may not regenerate properly
- Possible turbo issues
- Engine performance reduced
What Causes P0472? (Most Likely First)
- Short to ground in exhaust pressure sensor wiring Very High
- Failed sensor (shorted) High
- Corroded connector from heat and moisture Moderate
- PCM input fault Low
Can I Still Drive with P0472?
Short distances only. P0472 is rated moderate severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
Common Fixes by Vehicle
What techs usually find when diagnosing P0472 on specific vehicles — tap your vehicle for the fix and the exact part:
1999-2010 Ford F-250/Ford F-350/Ford Excursion Power Stroke Diesel moderate DIY
P0472 is the exhaust back pressure (EBP) sensor reading low - and on the Power Stroke the single most common cause is a plugged or corroded EBP tube, not a failed sensor. The steel tube that carries exhaust pressure to the sensor packs with soot and rusts through. It is routinely misdiagnosed: people replace the sensor, the code returns, and the tube was the problem all along. Remove the tube, clean it out or replace it, and inspect the sensor port before buying a sensor. Good practice is to clean or renew the tube whenever the sensor is replaced. When the ECM sees EBP out of range it disables back-pressure control, which is why you may also notice slower warm-up and reduced exhaust braking. Confirm the exact part for your year and engine with a retailer's fitment lookup or your VIN before ordering - these applications split by engine and build date.
Labor: 1-2 hours (tube clean/replace)Frequently Asked Questions
What does circuit low mean for the exhaust pressure sensor?
The PCM receives a voltage below the normal range, indicating a short to ground or failed sensor.
Can heat damage the sensor wiring?
Yes, the exhaust pressure sensor and its wiring are exposed to high exhaust temperatures, which can degrade insulation over time.
Is P0472 common on diesel trucks?
Yes, exhaust pressure sensor issues are common on diesel trucks due to the harsh operating environment and soot accumulation.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P0472?
-
Read sensor voltage. Below minimum at KOEO confirms low circuit.
-
Disconnect sensor and check for wiring short to ground.
-
Inspect connector for heat damage and corrosion.
-
Replace sensor if internally shorted.
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
P0472 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:
Which Vehicles Commonly Get P0472?
- 2010-2020 Ford F-250 (6.7L Diesel)
- 2012-2019 Ram 2500 (6.7L Cummins)
- 2008-2018 Chevrolet Silverado 2500 (6.6L Duramax)
- 2011-2020 GMC Sierra 2500 (6.6L Duramax)
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