P0547
Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 1
Exhaust / emissions
Generic OBD-II
Medium
What it means
P0547 means the ECM has detected a problem in the circuit for the exhaust gas temperature (EGT) sensor on bank 2, sensor 1. This sensor monitors exhaust heat to protect the turbocharger and emissions hardware. It does not by itself make the engine run poorly, but a lost signal can trigger reduced power on turbo-diesel vehicles and raise emissions.
Medium
Can I keep driving? Usually drivable, but on turbo-diesel vehicles the ECM may cut power to protect the turbo and exhaust aftertreatment, so get it checked soon.
Common symptoms
What you'll notice
- Check-engine light on
- Reduced power or a derate on turbo-diesel vehicles
- Higher exhaust emissions
- Slightly reduced fuel efficiency
Common causes
Most likely first
- Failed exhaust gas temperature (EGT) sensor on bank 2, sensor 1Likely
- Heat-damaged or chafed wiring near the exhaustCommon
- Corroded or loose connector at the sensorCommon
- ECM fault (rare)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data to confirm when the fault sets.
- Inspect the sensor and its harness near the exhaust for heat damage, chafing, or a loose connector.
- Measure the sensor's resistance/signal and compare against specification.
- Replace the EGT sensor if it reads out of range.
- If wiring and sensor check out, have the ECM circuit tested. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0547?+
Short trips are usually fine on gas engines. On turbo-diesels the EGT sensor protects the turbo and exhaust aftertreatment, so the vehicle may reduce power — get it fixed promptly.
Can I just clear P0547?+
It will return once the affected drive conditions repeat, because the sensor or its circuit is still faulty. Fix the cause first.
Related codes
Often seen with P0547
Read & clear P0547 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX