Damaged or disconnected wiring in the throttle vent control motor circuit, such as a broken wire or corroded connector; Failed throttle vent control motor, which may be stuck or have an open internal winding; Faulty throttle body assembly, where the vent control motor is integrated and the entire unit requires replacement; Poor electrical connection at the throttle body harness connector, often due to water intrusion or loose pins; PCM internal fault, though this is less common and should only be suspected after all other possibilities are ruled out; Contamination or carbon buildup inside the throttle body affecting the vent control motor operation

DTC codes / Honda codes / P1241

P1241 · HondaThrottle Vent Control Motor Circuit 1 Malfunction

Q: What does code P1241 mean?

Throttle Vent Control Motor Circuit 1 Malfunction. P1241 on Honda vehicles indicates that the powertrain control module (PCM) has detected an electrical fault in the throttle vent control motor circuit, which is part of the electronic throttle control system. The PCM monitors the circuit for expected voltage or current and sets this code when the signal is out of range, often due to a wiring issue or a failing vent control motor.

P1241 on Honda vehicles indicates that the powertrain control module (PCM) has detected an electrical fault in the throttle vent control motor circuit, which is part of the electronic throttle control system. The PCM monitors the circuit for expected voltage or current and sets this code when the signal is out of range, often due to a wiring issue or a failing vent control motor.

SystemPowertrain

Code typeHonda specific

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering (injector circuits)

Symptoms you may notice

Illumination of the check engine light, often with no other noticeable symptoms
Reduced engine power or limp mode, where the throttle responds sluggishly or is limited to a low speed
Rough idle or stalling, especially after startup or when coming to a stop
Poor acceleration or hesitation when pressing the accelerator pedal
In some cases, the engine may enter a fail-safe mode that limits RPM to about 2,000

Common causes, most likely first

Damaged or disconnected wiring in the throttle vent control motor circuit, such as a broken wire or corroded connector
Failed throttle vent control motor, which may be stuck or have an open internal winding
Faulty throttle body assembly, where the vent control motor is integrated and the entire unit requires replacement
Poor electrical connection at the throttle body harness connector, often due to water intrusion or loose pins
PCM internal fault, though this is less common and should only be suspected after all other possibilities are ruled out
Contamination or carbon buildup inside the throttle body affecting the vent control motor operation

How to diagnose and fix it

Inspect the throttle body harness connector for corrosion, loose pins, or water intrusion, and clean or repair as needed
Check the wiring between the throttle body and PCM for continuity and shorts to ground or power, repairing any damaged sections
Measure the resistance of the throttle vent control motor and compare to Honda specifications; replace the throttle body if out of range
Clear the diagnostic trouble code (DTC) and perform a throttle body adaptation or idle relearn procedure as required for the specific Honda model
If the code persists, substitute a known-good throttle body and retest to confirm whether the original unit is faulty
As a last resort, diagnose the PCM for internal faults, but only after verifying all external circuits and components are in good condition

Don't Replace the Throttle Body Yet

A loose or corroded ground connection at the throttle body can cause P1241 even when the motor and wiring test good, so always verify ground integrity before condemning parts.
Honda's throttle vent control motor is often part of the throttle body assembly, and replacing just the motor is not always possible; however, many technicians replace the entire throttle body unnecessarily when the real issue is a chafed wire near the intake manifold.
This code can be set by a weak battery or charging system issue that causes voltage spikes, so check battery health and charging voltage before diving into circuit diagnosis.
After repairs, a throttle body relearn or idle learn procedure is usually required on Hondas; skipping this step can cause rough idle or a repeat code even with a perfectly functioning system.
P1241 may appear alongside throttle actuator control codes like P2138 or P0122, which can mislead diagnosis; always address the root cause rather than chasing multiple codes as separate faults.

Can I keep driving with P1241?

You can usually drive the vehicle with P1241, but expect reduced engine power or limp mode, so avoid highways and heavy traffic until repaired. If the engine stalls or hesitates severely, stop driving and have the vehicle towed to a repair shop.

Tools that help

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Guidance is general and written for Honda vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.