What it means
Same as P242E on bank 1 sensor 5. 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 1 sensor 5 sends exhaust-temperature readings to the control module through its sensor circuit. P2484 is set when that signal becomes intermittent or erratic, so a loose contact or harness movement can cause the reading to jump even if it appears normal at other times.
Common causes
Most likely first.
- Intermittent contact at connector
- Connector with intermittent contact under vibration
- Harness routed against vibrating component
Symptoms
- Check-engine light on
How to diagnose it
- Record freeze-frame data and check bank 1 sensor 5 live data for sudden jumps or dropouts that coincide with the fault.
- Inspect the bank 1 sensor 5 connector for looseness, corrosion, moisture, or terminals that may not grip properly.
- Check whether the harness is routed against a vibrating or hot component and look for chafing or damaged insulation.
- While monitoring live data, gently move the bank 1 sensor 5 harness and connector to see whether the reading becomes erratic.
- If movement does not reveal the fault, test the sensor circuit and sensor connections under the manufacturer's procedures and specification.
Common fixes
- Secure the bank 1 sensor 5 connector and route the harness away from vibration or heat.
- Repair chafed or damaged bank 1 sensor 5 wiring.
- Clean or replace connector terminals with intermittent contact.
- Replace bank 1 sensor 5 if its signal remains erratic after wiring and connector checks.
Can I keep driving?
If only the check-engine light is on and the vehicle runs normally, a short drive is generally reasonable, but arrange diagnosis soon because the fault may come and go. Stop driving if the engine loses power or develops other serious symptoms.
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.