Diesel Trouble Codes

P2032 — Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 2 — 6.4 Power Stroke

P2032 on the 6.4L Power Stroke indicates the bank 1 sensor 2 exhaust gas temperature sensor signal voltage is below its valid range. On this platform the EGT…

Updated October 15, 2026

What it means

Generic definition: The bank 1 sensor 2 exhaust gas temperature sensor signal voltage is below its valid range. Platform note: On the 6.4L the EGT sensors around the DOC/DPF control regeneration; circuit low is usually a shorted sensor or a signal wire shorted to ground.1

Most likely causes

  1. EGT sensor 2 (bank 1) internal short to ground — The sensor element or internal wiring has failed low, pulling the signal toward ground. This matches the typical 6.4L pattern for a circuit-low EGT fault.1
  2. Signal wire shorted to ground in the exhaust harness — Heat and vibration near the DOC/DPF can chafe the EGT harness, grounding the signal wire. The 6.4L EGT wiring runs close to hot exhaust components.12
  3. Corroded or oil-contaminated EGT connector causing a low-resistance path to ground — Moisture and road grime at the sensor connector can create a low-voltage path. Inspect the connector for corrosion, oil intrusion, or damaged seals.12
  4. PCM EGT input circuit fault (less likely) — An internal PCM pull-down or wiring fault back to the PCM can present as a low signal. Verify wiring integrity before condemning the PCM.1

How to diagnose

  1. Verify freeze-frame and confirm P2032 is present with engine at operating temperature and during/after regen conditions.
  2. Visually inspect the bank 1 sensor 2 EGT sensor, connector, and harness from the sensor to the main loom for heat damage, chafing, oil contamination, or loose terminals.
  3. Disconnect the EGT sensor and measure sensor resistance/voltage per the service spec; a shorted sensor will read near zero ohms or show abnormal voltage.
  4. With the sensor disconnected, key on engine off, check the signal circuit voltage at the harness side; an abnormally low voltage indicates a short to ground in the harness.
  5. Perform a continuity and isolation test of the signal wire to ground and to the PCM pin; repair any chafed or grounded wiring and protect the harness from exhaust heat.
  6. Reconnect a known-good EGT sensor or substitute, clear codes, and monitor live EGT data and regen operation to confirm the circuit returns to normal range.

Parts and tools you may need

Tools you’ll need

Rough cost and difficulty

Likely repairPartsShop laborWho usually does it
Wiring or connector repair$10–$1001–4 hrsDIY with tools and a manual
Exhaust gas temperature sensor$50–$2500.5–1.5 hrsDIY with tools and a manual
ECM/PCM replacement (programmed)$600–$2,0001–3 hrsShop

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 faults are found in the exhaust tunnel or the PCM input is suspect, have a diesel technician with 6.4L experience perform the repair and verify regen operation with a scan tool. Do not attempt high-pressure fuel or exhaust work without proper safety precautions.

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

  1. Curated DTC seed — 6.4 Power Stroke (curated) ↩︎ ↩︎ ↩︎ ↩︎ ↩︎

  2. Curated DTC seed — 6.4 Power Stroke (curated) ↩︎ ↩︎