What it means
The exhaust gas temperature sensor on bank 1 sensor 6 reports a circuit low fault. EGT measurement at this position is unreliable.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
Bank 1 sensor 6 measures exhaust temperature at its designated point on the cylinder 1 bank. The control module monitors its circuit and sets this code when the signal is lower than expected. A short to ground, a faulty sensor, or a wiring or connector problem can pull the reading low.
Common causes
Most likely first.
- Signal circuit shorted to ground
- Exhaust gas temperature sensor fault
- Wiring or connector fault
Symptoms
- Check-engine light may be on
- Reduced engine performance
- Increased emissions or failed emissions test
How to diagnose it
- Record freeze-frame data and examine the bank 1 sensor 6 live reading for a value that is implausibly low or fixed.
- Locate bank 1 sensor 6 using service information and inspect its connector and harness for heat damage, corrosion, or a wire contacting ground.
- Check the sensor connector seating and terminal condition, then inspect the harness for breaks or chafing.
- Test the signal circuit for a short to ground and check sensor response against the manufacturer's specification.
- Repair the circuit fault or replace bank 1 sensor 6 if it fails testing with intact wiring.
Common fixes
- Clean and secure the bank 1 sensor 6 connector.
- Repair chafed or broken wiring, including a signal wire shorted to ground.
- Replace bank 1 sensor 6 if the sensor itself fails testing.
Can I keep driving?
Reduced engine performance or increased emissions may result if the control module cannot use the bank 1 sensor 6 reading. Avoid hard acceleration and prolonged trips until the circuit is repaired.
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.