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P2469 — Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 3

Manufacturer-specificPowertrain (engine & transmission)

P2469 indicates the powertrain control module (PCM) has detected an abnormally high voltage signal from the exhaust gas temperature (EGT) sensor located after the diesel particulate filter or catalytic converter on bank 2, sensor 3. This typically suggests an open circuit, short to power, or a failed sensor.

Symptoms

What causes it — most likely first

1. Faulty exhaust gas temperature sensor (Bank 2 Sensor 3)

The sensor itself may have failed internally, causing an open circuit or high resistance, leading to a high voltage signal interpreted by the PCM.

2. Wiring or connector issues (open or short to power)

Damaged, corroded, or loose wiring or connectors in the sensor circuit can cause a high voltage signal. A short to a power source in the harness is also a common cause.

3. Excessive exhaust gas temperatures (actual or perceived)

While less common, abnormally high exhaust temperatures due to engine running conditions (e.g., excessive load, turbocharger issues, or fuel system problems) may trigger this code if the sensor is functioning correctly.

4. Failed or degraded sensor harness or pigtail

The harness or pigtail connecting the sensor to the main wiring loom may be damaged, corroded, or melted due to heat exposure, leading to high resistance or an open circuit.

5. PCM software or calibration issue (rare)

In very rare cases, a PCM software glitch or incorrect calibration may misinterpret the sensor signal, though this is highly unlikely to be the root cause.

How it's diagnosed

  1. Retrieve and document all stored trouble codes and freeze frame data using an OBD-II scan tool.
  2. Visually inspect the EGT sensor (Bank 2 Sensor 3), wiring, and connectors for damage, corrosion, or signs of heat exposure. Repair or replace as needed.
  3. Using a digital multimeter, check the sensor’s resistance and voltage output. Compare readings to manufacturer specifications. Replace the sensor if out of spec.
  4. Inspect the wiring harness for continuity and proper voltage supply. Check for shorts to power or ground using a wiring diagram as a reference.
  5. Clear the code and test drive the vehicle to verify if the code returns. If it does, perform further testing on the sensor and circuit.
  6. If all electrical checks pass, monitor actual exhaust gas temperatures using a scan tool to rule out genuine high-temperature conditions.

Code facts & related codes

SystemPowertrain (engine & transmission)
StandardizationManufacturer-specific (P1/B1/C1/U1)
Related codesP2460 — Particulate Filter Pressure Sensor B CP2461 — Particulate Filter Pressure Sensor B CP2462 — Particulate Filter Pressure Sensor B CP2463 — Particulate Filter Restriction Soot P2464 — Particulate Filter Differential PressuP2465 — Particulate Filter Differential Pressu

Frequently asked

Is the PCM usually the cause of P2469?

No, the PCM is rarely the cause of P2469. The issue is almost always related to the sensor itself, wiring, or connectors. Replacing the PCM should only be considered after all other potential causes have been thoroughly ruled out.

Can I drive with P2469 stored?

While the vehicle may still be drivable, prolonged driving with this code can lead to increased emissions, potential DPF or catalytic converter damage, or reduced engine performance. It is advisable to diagnose and repair the issue promptly.

Why is Bank 2 Sensor 3 important?

Bank 2 Sensor 3 monitors exhaust gas temperature after the DPF or catalytic converter. This data is critical for emissions control, DPF regeneration, and protecting exhaust components from excessive heat. A faulty sensor can disrupt these processes.

Can a clogged DPF cause P2469?

While a clogged DPF can cause elevated exhaust temperatures, P2469 specifically indicates a high voltage signal from the sensor circuit. A clogged DPF may indirectly contribute if it leads to genuine high temperatures, but the code itself points to an electrical issue.