P0547
UniversalExhaust Gas Temperature Sensor Circuit - Bank 2 Sensor 1
The engine computer monitors the electrical signal from the exhaust gas temperature sensor identified as Bank 2 Sensor 1. P0547 means it has detected a problem in that sensor circuit; it does not by itself prove the sensor needs replacement. Depending on the vehicle, an inaccurate or missing temperature signal may affect engine or emissions-control operation, or the code may cause no noticeable change.
⚠️ Before You Begin (Safety First)
Exhaust components can remain hot after the engine is switched off. Let them cool before inspecting nearby wiring or connectors. If the vehicle develops severe power loss, unusual smoke, or an overheating warning, stop driving when safe and arrange an inspection.
Common Symptoms
- The check-engine light may be on because the engine computer has detected a sensor-circuit fault.
- There may be no noticeable change in how the vehicle runs.
- If the temperature signal is inaccurate or unavailable, engine or emissions-control operation may be affected, depending on the vehicle.
- Some vehicles may show reduced performance or other warning messages if related control strategies are affected.
Common Causes
- A fault within the exhaust gas temperature sensor.
- Damaged, loose, or corroded wiring or a connector problem in the sensor circuit.
- An open, short, or other electrical fault in the circuit.
- A fault in the engine control module or its connection, considered after the sensor and wiring are checked.
Diagnostic Steps
- Confirm the code with a scan tool and note any related codes; related faults can help guide diagnosis.
- With the engine off and exhaust fully cool, visually check accessible wiring and the connector for looseness, corrosion, or visible damage.
- Check that the wiring is not rubbing against or resting on hot or moving parts, without touching hot exhaust components.
- If damage is not visible, avoid replacing the sensor based on the code alone; have the circuit tested using service information for the specific vehicle.
When to Call a Professional
A technician can check for related codes, review scan data for the sensor signal, and inspect the connector and wiring. Circuit tests should follow the service information for the exact model, year, and engine; the results help distinguish a sensor fault from wiring or control-module problems.
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Commonly Asked Questions
Does P0547 mean the exhaust gas temperature sensor must be replaced?
No. The code identifies a detected circuit problem. Wiring, connectors, or a control-module connection may also be involved, so diagnosis should come before parts replacement.
What does Bank 2 Sensor 1 identify?
It identifies the sensor position specified by the code. The exact component location depends on the vehicle's engine layout; use model-, year-, and engine-specific service information.
Can I drive with P0547?
If the vehicle runs normally and has no other warnings, a cautious trip for diagnosis may be possible. Stop when safe if severe power loss, unusual smoke, or an overheating warning occurs.
How can a technician tell a sensor fault from a wiring fault?
They can review scan data and test the sensor circuit, connector, and wiring using the vehicle-specific wiring diagram and procedures. The code alone does not distinguish these causes.
Browse Available Code Guides
Previous and next available guides in database record order, across makes. Adjacent entries may share a code number and do not necessarily describe related faults.