P3474 — Cylinder 10 Deactivation/Intake Valve Control Circuit Performance

OBD2 code P3474 flags a problem with the sensor and actuator circuits (cylinder 10 deactivation/intake valve control circuit performance). The car is usually drivable while you plan the repair. Common culprits: control module driver fault, open or shorted wiring in the circuit, faulty sensor or actuator of the affected circuit.

For Ford vehicles

cylinder 10 deactivation/intake valve control circuit – range/performance problem

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 P3474 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 cylinder 10 deactivation/intake valve control 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 P3474 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for P3474 (parts and labor, USD, independent shop rates): Repair wiring or connectors: $80–$250; Control module repair: $300–$1,000; Replace the faulty sensor or actuator: $150–$500. Overall, fixing P3474 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 is the most common cause of P3474?

The most common causes are: control module driver fault, open or shorted wiring in the circuit, faulty sensor or actuator of the affected circuit.

How do I diagnose P3474 myself?

Start with a scan: confirm P3474, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the cylinder 10 deactivation/intake valve control, and verify the suspect component against live data before buying parts.

How much does it cost to fix P3474?

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

What are the symptoms of P3474?

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.

Will P3474 clear itself?

Sometimes P3474 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 does P3474 mean?

The engine control module sets P3474 when it detects a fault in the sensor and actuator circuits. In practical terms: cylinder 10 deactivation/intake valve control circuit performance. The code belongs to the powertrain (engine/transmission) group of OBD2 codes.

P3474 refers specifically to cylinder 10. On inline engines cylinders are counted from the front (belt end); on V-engines the numbering depends on the manufacturer, so check the firing-order diagram for your exact model. Location matters for the repair bill: some cylinders require intake manifold removal, which adds labor time.

The module monitors this system continuously while driving. When readings fall outside the expected range for a defined number of drive cycles, it stores P3474 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 P3474

  • 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 P3474?

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

How to diagnose P3474

  1. Connect an OBD2 scanner, confirm P3474 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 cylinder 10 deactivation/intake valve control 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 P3474 does not return.

How to fix P3474

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

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

How much does it cost to fix P3474?

Repair cost depends on which component actually failed. Typical scenarios for P3474 (parts and labor, USD, independent shop rates):

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

Overall, fixing P3474 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 P3474?

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