Diesel Trouble Codes

P0470 — Exhaust Pressure Sensor Malfunction (7.3 Power Stroke)

Diagnostic reference for 7.3L Power Stroke 1999-2003 Super Duty/Excursion. The 7.3L uses an Exhaust Back Pressure (EBP) sensor and regulator for cold-idle…

Updated September 2, 2026

What it means

On this platform the code refers to the Exhaust Back Pressure sensor circuit/signal, not a DPF pressure sensor. The 7.3L Power Stroke 1999-2003 has an EBP sensor and EBP regulator for cold idle warm-up; it has no DPF, EGR, VGT, or common-rail fuel system. The generic definition is exhaust back-pressure sensor signal out of range or implausible.1

Most likely causes

  1. EBP sensor signal out of range/implausible — The PCM sees an EBP sensor voltage outside the expected range. Generic definition for P0470 is exhaust back-pressure sensor signal out of range or implausible.1
  2. EBP sensor electrical fault / wiring issue — Open, short, or high-resistance in the EBP sensor signal/ground/power circuit can set P0470. The platform uses an EBP sensor for cold idle warm-up; EBP faults are P0470/P0472/P0473, not turbo-vane faults.12
  3. EBP sensor tube/pressure port restriction or blockage — Carbon/soot clogging the small pressure tube or sensor port causes implausible pressure readings. The 7.3L has an EBP system present for cold idle warm-up.12
  4. EBP sensor connector corrosion / oil contamination — Corrosion or oil ingress at the sensor connector leads to erratic signal. Typical on 7.3L Power Stroke 1999-2003 Super Duty/Excursion with EBP system.12

How to diagnose

  1. Verify code and freeze frame; confirm P0470 is present on 7.3L Power Stroke 1999-2003 with EBP system, no DPF/VGT.
  2. Inspect EBP sensor and pressure tube routing; look for cracks, kinks, carbon blockage, or loose fittings at the exhaust manifold/EBP regulator area.
  3. Disconnect EBP sensor and inspect connector for corrosion, oil contamination, bent pins; check wiring harness for chafing near exhaust heat.
  4. With key on engine off, check EBP sensor reference voltage and ground per wiring diagram; compare sensor signal voltage to spec and to a known-good sensor.
  5. Apply regulated low-pressure air to the sensor via the pressure tube (sensor removed) and monitor PID/signal for smooth, linear change; erratic or stuck output indicates a faulty sensor.
  6. Clear codes, test drive with cold start to allow EBP regulator operation; re-check for P0470/P0472/P0473 recurrence.

Parts and tools you may need

Rough cost and difficulty

Parts cost varies by brand and region; labor depends on access and whether the pressure tube requires cleaning/replacement. Prices are estimates only.

When to see a pro

If wiring damage is extensive, the EBP regulator actuator is stuck, or the code returns after sensor/tube service, have a qualified diesel technician inspect the exhaust back-pressure system and PCM data. Do not attempt high-pressure exhaust disassembly without proper training and safety equipment.

Sources

  1. Curated DTC seed — 7.3 Power Stroke (curated) ↩︎ ↩︎ ↩︎ ↩︎ ↩︎

  2. Curated DTC seed — 7.3 Power Stroke (curated) ↩︎ ↩︎ ↩︎

Watch a repair

Third-party videos, not ours — for illustration. Confirm anything against the factory service information for your truck.

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