P2470 — Exhaust Gas Temperature Sensor Circuit Low (Bank 1 Sensor 4) — 6.7 Powerstroke
The PCM sees the bank 1 sensor 4 exhaust gas temperature (EGT) sensor signal voltage below its valid range. On the 6.7L Power Stroke several EGT sensors around…
What it means
The PCM sees the bank 1 sensor 4 exhaust gas temperature (EGT) sensor signal voltage below its valid range.1
Most likely causes
- EGT sensor 4 internal short to ground or failed sensor element — A failed EGT sensor can pull the signal low and set a circuit-low fault.1
- Signal wire for EGT sensor 4 shorted to ground or chafed harness in the aftertreatment area — Wiring damage near the DOC/DPF/SCR can short the sensor signal to ground.1
- Corroded or loose connector at EGT sensor 4 or PCM causing low bias voltage — Moisture or heat cycling can degrade the connector and produce a low-voltage reading.1
- PCM reference/return circuit issue affecting EGT sensor 4 bias — A common reference or ground problem can make the PCM interpret the sensor signal as low.1
How to diagnose
- Verify freeze frame and confirm P2470 is present with engine at operating temperature.
- Inspect the aftertreatment harness and EGT sensor 4 connector for heat damage, corrosion, or chafing; repair as needed.
- Measure sensor supply and signal voltage at the EGT sensor 4 connector per Ford service information; compare to expected values.
- Disconnect EGT sensor 4 and check sensor resistance/voltage behavior; if out of spec, replace sensor.
- Check continuity and isolation of the signal wire from sensor to PCM; look for shorts to ground.
- Clear codes and perform a road test with monitored EGT sensor 4 data to confirm the circuit stays within range.
Parts and tools you may need
- Digital multimeter
- Scan tool with live data
- Wiring diagram for model year
- Dielectric grease
- Replacement EGT sensor 4 (confirm position per Ford service information)
Tools you’ll need
- digital multimeter — Measures sensor supply, signal voltage and checks for shorts to ground on the EGT sensor 4 circuit.
- OBD-II scan tool — Reads P2470, freeze frame and live EGT sensor 4 data to confirm the fault and monitor after repairs.
- inspection mirror — Lets you see the aftertreatment harness and EGT sensor 4 connector for heat damage and chafing in tight areas.
- wire piercing probes — Allows safe back-probing of the EGT sensor 4 signal wire to test continuity and isolation without cutting the harness.
Rough cost and difficulty
| Likely repair | Parts | Shop labor | Who usually does it |
|---|---|---|---|
| Wiring or connector repair | $10–$100 | 1–4 hrs | DIY with tools and a manual |
| Exhaust gas temperature sensor | $50–$250 | 0.5–1.5 hrs | DIY with tools and a manual |
| ECM/PCM replacement (programmed) | $600–$2,000 | 1–3 hrs | Shop |
Typical US independent-shop figures; labor runs about $120–$180 per hour (dealers charge more). Confirm the diagnosis before buying parts.
When to see a pro
If the code returns after sensor and harness checks, or if regeneration/SCR performance is affected, have a qualified diesel technician evaluate PCM inputs and aftertreatment control strategy.
Check for recalls
Recalls are tied to your truck’s VIN, so check yours directly: enter the VIN at NHTSA’s recall lookup. Open safety recalls are repaired free at a dealer.
Sources
Repair videos: P2470 on the 6.7 Power Stroke
Third-party videos, not ours — picked for this engine. Confirm anything against the factory service information for your truck.
Spotted an error, or something missing? Tell us
Run a 6.7 Powerstroke? This goes straight to the editor — it is not published.