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P2468 — Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 3

Manufacturer-specificPowertrain (engine & transmission)

The PCM detects that the exhaust gas temperature sensor on bank 2, sensor 3 is not reaching the expected temperature range, resulting in a low voltage signal. This can affect emissions control and engine performance.

Symptoms

What causes it — most likely first

1. Failed EGT sensor (Bank 2 Sensor 3)

The sensor element can degrade or develop an internal short, causing it to output a low voltage signal.

2. Wiring or connector problem

Damaged, corroded, or loose wiring harness and connector between the sensor and PCM can interrupt the signal, leading to a low reading.

3. Exhaust system issue causing sensor to be too cold

A leak upstream of the sensor or abnormal exhaust flow can result in the sensor measuring cooler gases than normal.

4. PCM input circuit fault

A fault in the PCM's analog input circuit for the sensor can misinterpret the signal as low, though this is less common.

How it's diagnosed

  1. Verify the code with a scan tool and check for related codes.
  2. Inspect the sensor wiring and connector for damage, corrosion, or loose pins.
  3. Measure the sensor's resistance and voltage at the PCM connector while the engine is at operating temperature.
  4. Compare the live data of Bank 2 Sensor 3 EGT to expected temperature values.
  5. If sensor and wiring are normal, test the PCM's input circuit for proper voltage reference and ground.
  6. Replace the sensor or repair wiring as needed before considering PCM replacement.

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

Can I just replace the PCM to fix this code?

Usually not; the issue is most often a faulty sensor, wiring, or exhaust condition, not the PCM.

Is it safe to drive with this code?

The vehicle may limit power or enter limp mode, so it's best to address the problem promptly to avoid further issues.

Will a dirty exhaust cause this code?

Yes, excessive soot or an exhaust leak can affect the sensor's temperature reading and trigger P2468.