P2033 — Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 2 — 6.4 Power Stroke

Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 2

Updated October 15, 2026

What it means

The bank 1 sensor 2 exhaust gas temperature sensor signal voltage is above its valid range. On the 6.4L Power Stroke, EGT sensors around the DOC/DPF are used for regeneration control. Circuit high is usually an open EGT sensor, a heat-damaged connector or harness near the exhaust, or an unplugged connector.¹²

Most likely causes

1. Open or failed EGT sensor (bank 1 sensor 2) causing high signal voltage — The sensor element or internal connection is open, driving the signal high. Typical on 6.4L for circuit high faults.¹²
2. Heat-damaged connector or wiring near the exhaust — Exhaust heat degrades the EGT 2 connector and harness, leading to an open circuit and high voltage reading.¹²
3. Unplugged or corroded EGT 2 connector — Connector separation or corrosion at the sensor or intermediate harness creates an open and a high signal.¹²
4. Open in the signal or reference circuit between sensor and PCM — Chafed or melted wiring in the exhaust area opens the circuit, producing a high voltage condition.¹²

How to diagnose

1. Verify the code and freeze-frame data; confirm P2033 is present and note conditions at set.
2. Visually inspect the EGT 2 sensor, connector, and harness routing near the DOC/DPF for heat damage, melting, oil contamination, or loose connection.
3. Check connector seating and terminal condition; look for corrosion, backed-out pins, or signs of exhaust heat exposure.
4. Inspect wiring for chafing, melting, or breaks along the exhaust path to the PCM harness.
5. Perform a resistance/continuity check of the EGT sensor circuit with the sensor disconnected to identify an open in the sensor or wiring.
6. Compare EGT sensor readings to adjacent EGT sensors during a controlled idle and light load to identify an out-of-range high reading.
7. Clear codes and monitor for reset under normal driving and during DPF regeneration conditions.

Parts and tools you may need

• Digital multimeter
• Scan tool with live data
• Terminal release tools
• Heat-resistant electrical tape / loom
• Replacement EGT sensor (bank 1 sensor 2)
• Dielectric grease

Tools you’ll need

• digital multimeter — Measures sensor resistance and circuit continuity to confirm an open or high-voltage condition on the EGT 2 signal/reference wires.
• OBD-II scan tool — Reads P2033 freeze-frame and live EGT sensor data to verify an out-of-range high reading and compare bank 1 sensor 2 to adjacent EGTs.
• inspection mirror — Lets you see the bank 1 sensor 2 EGT connector and harness routing near the hot DOC/DPF where heat damage or unplugged connections hide.
• terminal test light — Checks for reference/ground presence and signal integrity at the EGT connector without loading the circuit during a quick open-circuit test.

Rough cost and difficulty

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 damage is extensive, if the harness requires repair near hot exhaust components, or if the code returns after sensor replacement, have a diesel technician diagnose and repair the 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