P0547 — Exhaust Gas Temperature Sensor Circuit (Bank 2 Sensor 1)

P0547 — Exhaust Gas Temperature Sensor Circuit (Bank 2 Sensor 1). A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: faulty sensor or actuator of the affected circuit, corroded, loose or damaged connector, control module driver fault.

powertrain (engine/transmission)

Is it safe to drive?

Caution - arrange prompt diagnosis A confirmed P0547 is usually not an immediate stop-driving condition if the engine runs normally. Drive gently to a repair shop and avoid sustained high load, highway towing, or extended operation if the vehicle is losing power, running rough, making unusual exhaust noises, or showing an overheating warning.

Typical symptoms

  • The check engine light illuminates and the OBD2 system stores P0547
  • A slight loss of engine power, hesitation, or unstable idle may accompany an incorrect exhaust temperature signal
  • Stored fuel-trim or misfire information may appear because the powertrain control module is compensating for the faulty EGT signal
  • An unusual exhaust odor or ticking near the Bank 2 exhaust system may indicate a leaking exhaust joint or damaged sensor tube
  • P0547 may remain stored even when the engine otherwise starts, accelerates, and runs normally

Common causes

  • A failed exhaust gas temperature sensor at Bank 2 Sensor 1, with internal drift, an open element, or an implausibly high signal output
  • Heat-damaged or corroded wiring and connector pins around the Bank 2 exhaust gas temperature sensor
  • An open, high-resistance, or short-to-voltage fault in the Bank 2 Sensor 1 signal circuit
  • A poor sensor ground or damaged shared ground connection that shifts the EGT signal outside its expected range
  • A damaged powertrain control module input pin or internal circuit connected to the Bank 2 Sensor 1 circuit
  • An exhaust leak near Bank 2 Sensor 1 that exposes the sensor to abnormal exhaust flow and corrupts its reading

How to diagnose with an OBD scanner

  1. Confirm P0547 and capture related data Connect an OBD2 scanner such as an ELM327 adapter with AIScanAuto or equivalent software. Read stored codes, freeze-frame data, and live Bank 2 Sensor 1 exhaust gas temperature data. Confirm that P0547 is active or pending and note any misfire, fuel-trim, or catalyst information before disconnecting the battery.
  2. Identify the correct EGT sensor Locate Bank 2 Sensor 1 on the exhaust system and verify its identity against the vehicle wiring diagram or component location information. This is generally the upstream EGT sensor on the Bank 2 exhaust side, ahead of the catalytic converter, but connector layout and routing must be verified rather than assumed.
  3. Inspect the sensor and wiring With the engine off, inspect the EGT sensor body, wiring loom, connector, and ground points for burnt discoloration, green corrosion, cracked insulation, pin retraction, or heat damage. Firmly reseat the connector and check for chafing where the harness crosses brackets or moving exhaust components.
  4. Perform an electrical test Following the manufacturer procedure, measure Bank 2 Sensor 1 resistance at a known temperature and test the sensor supply, ground, and signal voltage. Compare the readings with the specified range, then lightly move the connector and harness while watching for signal changes. An open, shorted, or drifting sensor confirms the circuit fault.
  5. Repair, clear, and verify Replace the Bank 2 Sensor 1 EGT sensor or repair the identified wiring, ground, connector, or exhaust leak. Clear P0547 with the scanner, then monitor live sensor values, pending codes, and drive-cycle results. P0547 should not return if the signal and exhaust system are operating correctly.

Approximate repair cost

Typical independent-shop estimate for diagnosing and repairing P0547 is USD 175-500, including scan diagnosis, a Bank 2 Sensor 1 EGT sensor when required, connector or wiring repairs, and labor. These figures are estimates and vary by region, vehicle, parts supplier, and the extent of the exhaust or electrical repair.

Common questions

What does OBD2 code P0547 mean?

P0547 identifies a fault in the exhaust gas temperature sensor circuit for Bank 2 Sensor 1. The signal is commonly implausibly high or otherwise outside the range expected by the powertrain control module.

Can I continue driving with P0547 stored?

If P0547 is the only code and the engine runs normally, limited gentle driving to a shop is generally reasonable. Avoid heavy acceleration or long highway trips if hesitation, stalling, misfires, or an overheating warning are present.

Where is the P0547 sensor located?

The P0547 circuit uses the exhaust gas temperature sensor identified as Bank 2 Sensor 1, typically on the upstream side of the Bank 2 catalytic converter. Confirm the exact location because exhaust layouts and connector positions differ.

Should the Bank 2 Sensor 1 EGT sensor be replaced first?

Do not replace parts blindly. Inspect and electrically test the sensor, connector, ground, and signal wiring first, because corrosion, pin damage, or a wiring short can store P0547 even when the EGT sensor itself is sound.

When your engine control unit detects a problem with the exhaust gas temperature sensor circuit on Bank 2 Sensor 1, it logs trouble code P0547. This code belongs to the powertrain category, meaning it affects engine or transmission operation. The sensor in question sits upstream of the catalytic converter on the engine bank opposite cylinder 1 — getting the bank and sensor position wrong is the most frequent error do-it-yourselfers make when addressing this code.

P0547 does not trigger from a single anomalous reading. The control module requires the fault condition to repeat under specific operating parameters before activating the Check Engine light. When the code is stored, the freeze frame data captures critical engine metrics — load, RPM, coolant temperature, vehicle speed — showing exactly when the problem occurred. Replicating those conditions during diagnosis is essential for accurate troubleshooting.

The exhaust gas temperature sensor monitors how hot the exhaust gases are before they enter the emissions control system. This data helps the ECU fine-tune fuel delivery, manage turbocharger wastegate operation, and protect the catalytic converter from overheating. When the sensor circuit fails to deliver expected voltage signals, the ECU cannot perform these functions correctly and sets P0547 to alert you.

Symptoms of P0547

  • The Check Engine light illuminates on the dashboard
  • Fuel economy drops noticeably in some vehicles
  • The exhaust gas temperature regulation system operates intermittently or stops working entirely
  • The vehicle may enter limp mode with reduced power output
  • Other emissions-related systems may be disabled or derated
  • In rare cases, rough idle or hesitation during acceleration occurs

Common Causes of P0547

  • Damaged, corroded, or loose electrical connector at the sensor
  • Wiring harness chafing, melting, or physical damage creating opens or shorts
  • Blown fuse protecting the sensor circuit
  • Insufficient ground connection at the sensor or control module
  • Faulty exhaust gas temperature sensor itself
  • Powertrain control module driver circuit failure (less frequent)
  • Aftermarket modifications interfering with the sensor circuit

Diagnosing P0547

Begin by connecting a professional OBD2 scanner to confirm P0547 is present and record all stored freeze frame data. This snapshot reveals engine load, RPM, coolant temperature, and speed at the moment the fault occurred.

Next, retrieve any related diagnostic trouble codes. P0547 often appears alongside other sensor or circuit codes that point toward the root cause. Check manufacturer technical service bulletins for your specific make and model — many issues have documented software updates or factory repair procedures.

Perform a thorough visual inspection of the Bank 2 Sensor 1 wiring harness and connector. Look for damaged insulation, melted wire, corrosion buildup, bent pins, or moisture intrusion. The sensor mounts near the exhaust manifold where heat and road salt cause significant wear.

Measure reference voltage, ground circuit resistance, and signal continuity at the sensor connector using a multimeter. Compare readings against manufacturer specifications. Low voltage, high resistance, or no signal confirms a circuit problem.

Conduct a wiggle test by gently moving the harness while monitoring live data on your scanner. Any signal dropouts or interruptions indicate broken wires inside the insulation that are not visible during static inspection.

Clear the code and perform a complete drive cycle including conditions matching the freeze frame data. If P0547 returns, the fault is confirmed and component-level testing or replacement is next.

Repair Options and Costs

The fix depends entirely on which part of the circuit failed. Addressing the most probable causes first saves money.

Replace the exhaust gas temperature sensor: $150–$500 (parts and labor at independent shop rates)

Repair damaged wiring or connectors: $80–$250 for harness repair or connector replacement

Control module diagnosis and repair: $300–$1,000 if the PCM driver circuit is faulty

Overall, fixing P0547 typically ranges from $80 to $1,000 depending on the root cause. An accurate diagnosis before purchasing parts prevents unnecessary expense — the sensor itself is rarely the culprit when a simple wiring repair solves the problem.

Can You Drive with P0547?

The severity rating for this code is short, meaning most vehicles remain drivable with P0547 stored. You may notice decreased fuel economy, limited power in certain driving modes, or emissions system functions being disabled. However, if the vehicle exhibits stalling, failure to start, or warnings affecting brake or steering systems, treat the condition as urgent and seek immediate repair.

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