P2032 — Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 2 — 6.7 Cummins (EGR + DPF, pre-SCR)
Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 2
What it means
The bank 1 sensor 2 exhaust gas temperature sensor signal voltage is below its valid range. On the 6.7L Cummins this is usually a shorted EGT sensor or a signal wire shorted to ground.1
Most likely causes
- Shorted EGT sensor (bank 1 sensor 2) pulling signal low — Sensor internal short to ground causes low voltage on the signal circuit. Typical on this platform for P2032.1
- Signal wire shorted to ground between sensor and ECM — Chafed or melted harness in the exhaust area shorts the signal wire to ground, producing a low voltage reading.1
- Corroded or contaminated EGT sensor connector — Moisture or soot in the connector creates a low-resistance path to ground or high resistance that biases the signal low. Check the sensor and its connector near the exhaust.2
How to diagnose
- Verify freeze frame and confirm P2032 is active with engine at operating temperature.
- Inspect the bank 1 sensor 2 EGT sensor and harness for heat damage, chafing, or oil/coolant contamination near the exhaust/DPF area.
- Disconnect the EGT sensor and measure sensor resistance/voltage per service spec; a shorted sensor reads out of range low.
- With sensor disconnected, check ECM signal pin voltage and reference/ground integrity; look for a short to ground on the signal wire.
- Inspect and clean the EGT connector; repair any corrosion, moisture intrusion, or damaged terminals.
- Repair wiring faults, replace the EGT sensor if shorted, clear codes and monitor EGT readings and DPF regeneration behavior.
- If wiring and sensor test good, evaluate ECM input circuit per manufacturer procedure.
- Document findings and confirm no related DPF regeneration faults after repair.
Parts and tools you may need
- Digital multimeter
- Scan tool with live data
- Terminal cleaning kit
- Heat-resistant wiring repair materials
- Replacement EGT sensor bank 1 sensor 2
Tools you’ll need
- digital multimeter — Measures sensor resistance and ECM signal voltage to detect a shorted EGT sensor or signal wire shorted to ground.
- scan tool — Reads P2032 freeze frame and live EGT data to confirm the fault is active and monitor sensor recovery after repair.
- terminal release tool — Allows safe inspection and cleaning of the EGT connector terminals without damage.
- inspection mirror — Provides visibility of the bank 1 sensor 2 EGT sensor and harness in the tight exhaust/DPF area for heat damage and chafing.
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 wiring tests normal and a new sensor does not clear the code, have a qualified diesel technician evaluate the ECM input circuit. Do not attempt high-pressure fuel or exhaust system repairs without proper training and safety equipment.
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
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