What it means
Same as P242C on bank 2 sensor 3. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
Bank 2 sensor 3 monitors exhaust gas temperature, and the control module uses its signal to manage emissions equipment and protect the DPF and catalyst. P2468 sets when the circuit signal is lower than expected, commonly because the signal is shorted to ground or the connector has excessive resistance.
Common causes
Most likely first.
- Signal shorted to ground
- Connector pins corroded - high contact resistance
- Harness chafing through insulation
Symptoms
- Check engine light on
- DPF or emissions warning light may come on
- Reduced power or limited regeneration may occur
- Increased fuel consumption
How to diagnose it
- Record freeze-frame data and inspect live bank 2 sensor 3 temperature for an implausibly low reading compared with a cold engine or other exhaust sensors.
- Inspect the bank 2 sensor 3 connector for water, corrosion, pushed-back pins, or poor terminal contact.
- Follow the sensor wiring along the hot exhaust area and look for chafing, crushed insulation, or a wire touching ground.
- With live data displayed, gently move the connector and harness to see whether the low signal changes or returns.
- Test the signal circuit for a short to ground and check connector and ground integrity using the manufacturer's wiring information.
- If the harness tests correctly, compare bank 2 sensor 3 operation with the manufacturer's specification and replace the sensor if it fails.
Common fixes
- Clean and secure corroded or loose bank 2 sensor 3 connector terminals.
- Repair chafed wiring or a signal wire shorted to ground.
- Restore proper pin contact or repair a poor circuit ground.
- Replace bank 2 sensor 3 if its signal remains low with a sound circuit.
Can I keep driving?
Gentle driving may be possible if there is no power loss, but avoid heavy loads and address a DPF or emissions warning promptly. Incorrectly low temperature feedback can limit regeneration and emissions-system protection.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.