P2747 — Intermediate Shaft Speed Sensor B Circuit No Signal

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 P2747 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 intermediate shaft speed sensor b circuit for damage, corrosion, chafing or poor contact.
  4. Subsystem check Verify power and ground directly at the intermediate shaft speed sensor b circuit connector with a multimeter before touching the signal side.
  5. Subsystem check Measure reference voltage, ground and signal continuity at the component connector.
  6. Subsystem check Wiggle-test the harness while watching the signal in live data — dropouts reveal broken wires.
  7. Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2747 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for P2747 (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 P2747 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

How do I diagnose P2747 myself?

Start with a scan: confirm P2747, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the intermediate shaft speed sensor b circuit, and verify the suspect component against live data before buying parts.

What are the symptoms of P2747?

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

How much does it cost to fix P2747?

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 is the most common cause of P2747?

The most common causes are: control module driver fault, faulty sensor or actuator of the affected circuit, blown fuse feeding the circuit.

What does OBD2 code P2747 mean?

Intermediate Shaft Speed Sensor B Circuit No Signal (P2747): a powertrain (engine/transmission) fault affecting the sensor and actuator circuits. The car is usually drivable while you plan the repair. Most often caused by control module driver fault, faulty sensor or actuator of the affected circuit, blown fuse feeding the circuit.

What does P2747 mean?

The engine control module sets P2747 when it detects a fault in the sensor and actuator circuits. In practical terms: intermediate shaft speed sensor b circuit no signal. The code belongs to the powertrain (engine/transmission) group of OBD2 codes.

“No signal” or “invalid data” means the module receives nothing usable from the intermediate shaft speed sensor b circuit — as if it were not connected at all. Check power and ground of the component before suspecting the signal wire: a dead component produces the same code.

The module monitors this system continuously while driving. When readings fall outside the expected range for a defined number of drive cycles, it stores P2747 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.

Common symptoms of P2747

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

What causes P2747?

  • completely failed intermediate shaft speed sensor b circuit
  • no power or ground at the intermediate shaft speed sensor b circuit
  • open signal wire or connector
  • corroded, loose or damaged connector
  • poor ground connection
  • blown fuse feeding the circuit
  • control module driver fault

How to diagnose P2747

  1. Connect an OBD2 scanner, confirm P2747 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 intermediate shaft speed sensor b circuit for damage, corrosion, chafing or poor contact.
  4. Verify power and ground directly at the intermediate shaft speed sensor b circuit connector with a multimeter before touching the signal side.
  5. Measure reference voltage, ground and signal continuity at the component connector.
  6. Wiggle-test the harness while watching the signal in live data — dropouts reveal broken wires.
  7. Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2747 does not return.

How to fix P2747

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 P2747?

Repair cost depends on which component actually failed. Typical scenarios for P2747 (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 P2747 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 P2747?

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