P2473 — Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 4

P2473 — Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 4. 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, open or shorted wiring in the circuit, poor ground connection.

powertrain (engine/transmission)

Is it safe to drive?

Short-term driving is OK In most cases the car remains drivable, possibly with reduced performance or a disabled auxiliary system. If symptoms include stalling, no-start or brake/steering warnings, treat it as urgent.

How to diagnose with an OBD scanner

  1. Read the code and freeze frame Connect an OBD2 scanner, confirm P2473 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
  2. Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
  3. Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the exhaust gas temperature sensor circuit bank 2 sensor 4 for damage, corrosion, chafing or poor contact.
  4. Subsystem check Measure reference voltage, ground and signal continuity at the component connector.
  5. Subsystem check Wiggle-test the harness while watching the signal in live data — dropouts reveal broken wires.
  6. Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2473 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for P2473 (parts and labor, USD, independent shop rates): Repair wiring or connectors: $80–$250; Replace the faulty sensor or actuator: $150–$500; Control module repair: $300–$1,000. Overall, fixing P2473 usually costs between $80 and $1,000. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Common questions

Will P2473 clear itself?

Sometimes P2473 clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.

What is the most common cause of P2473?

The most common causes are: faulty sensor or actuator of the affected circuit, open or shorted wiring in the circuit, poor ground connection.

What does OBD2 code P2473 mean?

P2473 — Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 4. 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, open or shorted wiring in the circuit, poor ground connection.

How do I diagnose P2473 myself?

Start with a scan: confirm P2473, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the sensor and actuator circuits, and verify the suspect component against live data before buying parts.

How much does it cost to fix P2473?

Repair wiring or connectors — $80–$250; Replace the faulty sensor or actuator — $150–$500; Control module repair — $300–$1,000. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.

What does P2473 mean?

Seeing P2473 on your scanner? The control unit has caught the sensor and actuator circuits operating outside its calibrated window. The formal description is “Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 4”, and the code is grouped under powertrain (engine/transmission) faults.

In this definition, “Bank 2” is the side of the engine opposite to cylinder 1 and “Sensor 4” is the downstream (after the catalytic converter) sensor. Mixing up banks and sensor positions is the most common DIY mistake with this code — verify the physical location before replacing anything.

This code does not appear from a single bad reading: the module must see the fault condition repeat under defined operating conditions before it turns on the warning light. The freeze frame captured with P2473 — engine load, rpm, temperature, speed — tells you exactly when the problem occurs, so reproduce those conditions when testing.

What causes P2473?

  • poor ground connection
  • open or shorted wiring in the circuit
  • control module driver fault
  • blown fuse feeding the circuit
  • corroded, loose or damaged connector
  • faulty sensor or actuator of the affected circuit

Common symptoms of P2473

  • increased fuel consumption in some cases
  • possible limp mode depending on the affected component
  • the affected system operates intermittently or not at all
  • Check Engine Light on

How to diagnose P2473

  1. Connect an OBD2 scanner, confirm P2473 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
  2. Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
  3. Visually inspect the wiring harness and connectors related to the exhaust gas temperature sensor circuit bank 2 sensor 4 for damage, corrosion, chafing or poor contact.
  4. Measure reference voltage, ground and signal continuity at the component connector.
  5. Wiggle-test the harness while watching the signal in live data — dropouts reveal broken wires.
  6. Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2473 does not return.

How to fix P2473

Start with the cheapest and most common causes before replacing expensive parts:

  • Repair wiring or connectors — $80–$250
  • Replace the faulty sensor or actuator — $150–$500
  • Control module repair — $300–$1,000

How much does it cost to fix P2473?

Repair cost depends on which component actually failed. Typical scenarios for P2473 (parts and labor, USD, independent shop rates):

  • Repair wiring or connectors: $80–$250
  • Replace the faulty sensor or actuator: $150–$500
  • Control module repair: $300–$1,000

Overall, fixing P2473 usually costs between $80 and $1,000. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Can you drive with P2473?

In most cases the car remains drivable, possibly with reduced performance or a disabled auxiliary system. If symptoms include stalling, no-start or brake/steering warnings, treat it as urgent.

Related OBD2 codes