P2079 — Intake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit Intermittent Bank 1

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 P2079 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 intake manifold tuning (IMT) valve position sensor/switch circuit intermittent bank 1 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 P2079 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for P2079 (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 P2079 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 P2079 clear itself?

Sometimes P2079 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.

How do I diagnose P2079 myself?

Start with a scan: confirm P2079, 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 P2079?

The most common causes are: faulty sensor or actuator of the affected circuit, poor ground connection, control module driver fault.

What are the symptoms of P2079?

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 P2079?

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 P2079 mean?

Behind P2079 is a specific failure in the sensor and actuator circuits: intake manifold tuning (IMT) valve position sensor/switch circuit intermittent bank 1. The onboard computer stores it in the powertrain (engine/transmission) group after verifying the fault over repeated checks.

“Bank 1” means the side of the engine that contains cylinder 1. Verify which side that is on your specific engine before testing or replacing parts.

The module monitors this system continuously while driving. When readings fall outside the expected range for a defined number of drive cycles, it stores P2079 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 P2079

  • 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 P2079?

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

How to diagnose P2079

  1. Connect an OBD2 scanner, confirm P2079 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 intake manifold tuning (IMT) valve position sensor/switch circuit intermittent bank 1 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 P2079 does not return.

How to fix P2079

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 P2079?

Repair cost depends on which component actually failed. Typical scenarios for P2079 (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 P2079 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 P2079?

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