Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 3
The P2468 code indicates that the exhaust gas temperature (EGT) sensor on Bank 2, Sensor 3 is reporting a voltage lower than the expected range. This sensor monitors exhaust temperature to protect the diesel particulate filter (DPF) and other aftertreatment components. A low circuit condition can be caused by a faulty sensor, wiring issues, or a short to ground. This may lead to incorrect temperature readings, affecting DPF regeneration and potentially causing emissions system damage.
01. Most Common Causes
- Faulty exhaust gas temperature sensor
- Short to ground in sensor wiring or connector
- Corroded or damaged sensor connector
- Open circuit in sensor signal wire
- Engine control module (ECM) issue (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel economy
- Possible DPF regeneration issues
- Increased exhaust emissions
- Engine may enter limp mode
03. Step-by-Step Diagnosis
Step 1: Connect a scan tool and verify the code P2468. Check for other related codes.
Step 2: Visually inspect the EGT sensor Bank 2 Sensor 3 wiring and connector for damage, corrosion, or loose connections.
Step 3: Measure the sensor resistance and compare to manufacturer specifications. A shorted sensor will show very low resistance.
Step 4: Check for a short to ground by disconnecting the sensor and measuring voltage at the harness connector with key on. Should be around 5V reference.
Step 5: If all checks pass, replace the EGT sensor and clear the code.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances with this code, as it can lead to DPF damage and reduced engine performance. Short trips may be possible, but immediate diagnosis is advised.
How much does it cost to fix?▼
The cost typically ranges from $150 to $400, including parts and labor. The sensor itself costs $50-$150, and labor adds $100-$250 depending on vehicle and shop rates.