What it means
Same as P242D 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 measures exhaust temperature for the module's emissions-system and thermal-protection strategies. P2469 sets when the circuit signal is higher than expected, often because the signal wire is shorted to a supply voltage or has a connection fault.
Common causes
Most likely first.
- Signal shorted to supply
- Connector pins corroded - high contact resistance
- Supply wire pinched against B+ source
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
- Save freeze-frame data and check whether bank 2 sensor 3 reports an implausibly high temperature compared with engine conditions and other exhaust sensors.
- Inspect the sensor connector for corrosion, pushed-back pins, moisture, or signs of overheating.
- Trace bank 2 sensor 3 wiring for chafing, crushed insulation, or contact with a power source, especially near the exhaust.
- Watch live temperature data while gently moving the harness to see whether the high signal changes with movement.
- Test the signal circuit for a short to supply and check the connector, supply, and ground against the manufacturer's wiring information.
- If the wiring is sound, compare the sensor output with the manufacturer's specification and replace the sensor if it is faulty.
Common fixes
- Repair wiring that is pinched against a supply source or shorted to voltage.
- Repair corroded or loose terminals at the bank 2 sensor 3 connector.
- Secure or replace heat-damaged wiring in the sensor harness.
- Replace bank 2 sensor 3 if it produces a high signal with a sound circuit.
Can I keep driving?
Drive gently and avoid towing or hard acceleration if a DPF or emissions warning appears, because the module may limit regeneration or thermal protection. Arrange diagnosis soon to reduce the chance of emissions-system damage.
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.