P247B — Exhaust Gas Temperature Out of Range Bank 1 Sensor 4

OBD2 code P247B flags a problem with the sensor and actuator circuits (exhaust gas temperature out of range bank 1 sensor 4). The car is usually drivable while you plan the repair. Common culprits: open or shorted wiring in the circuit, faulty sensor or actuator of the affected circuit, blown fuse feeding the circuit.

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 P247B 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 out of range bank 1 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 P247B does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for P247B (parts and labor, USD, independent shop rates): Replace the faulty sensor or actuator: $150–$500; Repair wiring or connectors: $80–$250; Control module repair: $300–$1,000. Overall, fixing P247B 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

What are the symptoms of P247B?

Drivers most often notice: possible limp mode depending on the affected component, Check Engine Light on, increased fuel consumption in some cases, the affected system operates intermittently or not at all.

How do I diagnose P247B myself?

Start with a scan: confirm P247B, 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.

What is the most common cause of P247B?

The most common causes are: open or shorted wiring in the circuit, faulty sensor or actuator of the affected circuit, blown fuse feeding the circuit.

What does OBD2 code P247B mean?

OBD2 code P247B flags a problem with the sensor and actuator circuits (exhaust gas temperature out of range bank 1 sensor 4). The car is usually drivable while you plan the repair. Common culprits: open or shorted wiring in the circuit, faulty sensor or actuator of the affected circuit, blown fuse feeding the circuit.

How much does it cost to fix P247B?

Replace the faulty sensor or actuator — $150–$500; Repair wiring or connectors — $80–$250; 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 P247B mean?

P247B (Exhaust Gas Temperature Out of Range Bank 1 Sensor 4) is stored when self-diagnostics detect abnormal readings or behaviour of the sensor and actuator circuits. It belongs to the powertrain (engine/transmission) category.

In this definition, “Bank 1” is the side of the engine that contains 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.

The module monitors this system continuously while driving. When readings fall outside the expected range for a defined number of drive cycles, it stores P247B and switches on the warning light. Freeze frame data saved with the code shows the exact conditions — rpm, load, temperature, speed — at the moment the fault was detected, which is the best starting point for diagnosis.

What causes P247B?

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

Common symptoms of P247B

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

How to diagnose P247B

  1. Connect an OBD2 scanner, confirm P247B 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 out of range bank 1 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 P247B does not return.

How to fix P247B

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

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

How much does it cost to fix P247B?

Repair cost depends on which component actually failed. Typical scenarios for P247B (parts and labor, USD, independent shop rates):

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

Overall, fixing P247B 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 P247B?

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.

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