P2607 — Intake Air Heater "B" Circuit Low

How do I diagnose P2607 myself?

Start with a scan: confirm P2607, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the intake air heater "B", and verify the suspect component against live data before buying parts.

Is it safe to drive with P2607?

Drive with caution. Many throttle faults put the car into limp mode with limited power — enough to reach a shop, not for highway trips. If the engine stalls or the pedal stops responding, do not drive.

How much does it cost to fix P2607?

Replace the MAF or MAP sensor — $150–$400; Clean the throttle body — $80–$200; Replace the throttle body assembly — $250–$700. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.

What does OBD2 code P2607 mean?

OBD2 code P2607 flags a problem with the throttle and intake air metering (intake air heater "B" circuit low). Short, gentle driving to a shop is usually possible. Common culprits: contaminated or failed MAF/MAP sensor, dirty throttle body or stuck throttle plate, faulty throttle position sensor or pedal sensor.

What is the most common cause of P2607?

The most common causes are: contaminated or failed MAF/MAP sensor, dirty throttle body or stuck throttle plate, faulty throttle position sensor or pedal sensor.

What does P2607 mean?

The engine control module sets P2607 when it detects a fault in the throttle and intake air metering. In practical terms: intake air heater "B" circuit low. The code belongs to the powertrain (engine/transmission) group of OBD2 codes.

“Circuit low” means the voltage on the intake air heater "B" circuit stays below the expected minimum — close to ground. The usual physical reasons are a short to ground, a chafed wire touching metal, a missing supply voltage, or a failed component dragging the signal down.

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 P2607 — engine load, rpm, temperature, speed — tells you exactly when the problem occurs, so reproduce those conditions when testing.

Common symptoms of P2607

• unstable or high idle
• stalling when coming to a stop
• limp-home mode with reduced power
• Check Engine Light on
• poor throttle response

What causes P2607?

• failed intake air heater "B" pulling the signal low
• signal wire shorted to ground (chafed insulation)
• missing supply voltage to the intake air heater "B"
• intake air leaks after the MAF sensor
• failed electronic throttle motor
• faulty throttle position sensor or pedal sensor
• wiring or connector faults in the throttle circuit

How to diagnose P2607

1. Connect an OBD2 scanner, confirm P2607 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 throttle and intake air metering for damage, corrosion, chafing or poor contact.
4. Check for supply voltage at the intake air heater "B" connector first; then measure resistance from the signal wire to ground — near-zero ohms confirms a short to ground in the harness.
5. Inspect and clean the throttle body; check that the plate moves freely.
6. Watch throttle position and MAF/MAP readings in live data while pressing the pedal — values should change smoothly.
7. Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2607 does not return.

How to fix P2607

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

• Replace the MAF or MAP sensor — $150–$400
• Clean the throttle body — $80–$200
• Replace the throttle body assembly — $250–$700

How much does it cost to fix P2607?

Repair cost depends on which component actually failed. Typical scenarios for P2607 (parts and labor, USD, independent shop rates):

• Replace the MAF or MAP sensor: $150–$400
• Clean the throttle body: $80–$200
• Replace the throttle body assembly: $250–$700

Overall, fixing P2607 usually costs between $80 and $700. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Can you drive with P2607?

Drive with caution. Many throttle faults put the car into limp mode with limited power — enough to reach a shop, not for highway trips. If the engine stalls or the pedal stops responding, do not drive.

Related OBD2 codes

• P2600: Coolant Pump "A" Control Circuit/Open
• P2601: Coolant Pump "A" Control Circuit Range/Performance
• P2602: Coolant Pump "A" Control Circuit Low
• P2603: Coolant Pump "A" Control Circuit High
• P2604: Intake Air Heater "A" Circuit Range/Performance
• P2605: Intake Air Heater "B" Circuit/Open