Mitsubishi Throttle Position Sensor Potentiometer MD614734 ODM

MD614734 Throttle Position Sensor for Mitsubishi

The sensor operates by detecting the throttle valve position and converting mechanical rotation into an electrical signal. The signal voltage varies proportionally with throttle opening, providing the ECU with continuous, real-time data for fuel injection and ignition timing adjustments. The clockwise rotation direction ensures compatibility with the throttle shaft orientation in the designated vehicle applications.

The sensor transmits two signals—VTA1 and VTA2—to the ECU. If the voltage output difference between these two signals deviates from the normal operating range, the ECU interprets this as a malfunction of the throttle position sensor and illuminates the Malfunction Indicator Lamp (MIL).

The Throttle Position Sensor MD614734 is an Original Equipment (OE) number primarily associated with Mitsubishi vehicles. It is identified by the following OE reference numbers and cross-references:

Aftermarket Cross-Reference Numbers:

Common Reference Designations:

• Throttle Position Sensor (TPS)
• Sensor, Throttle Body Throttle
• Accelerator Throttle Position Sensor

The Throttle Position Sensor MD614734 is designed for compatibility with a wide range of Mitsubishi vehicles, covering models from the mid-1990s through the mid-2000s.

Power Range:

• 55 – 100 kW (75 – 136 hp)

Important Compatibility Notes:

• This sensor is an Original Equipment (OE) number for Mitsubishi vehicles
• Compatible with both manual and automatic transmission variants
• Always cross-check the OE reference number against the number found on your current unit to ensure proper fitment
• The sensor is mounted on the throttle body and provides the ECU with throttle position information
• Always compare old and new parts, particularly the OE number

A failing or malfunctioning Throttle Position Sensor can produce a range of drivability issues. Below are the most common symptoms to watch for:

One of the earliest indicators of a TPS problem is the illumination of the Malfunction Indicator Lamp (Check Engine Light) on the dashboard. The ECU may enter fail-safe mode and illuminate the MIL. Common diagnostic trouble codes (DTCs) associated with TPS failure include:

• P0120 – Throttle/Pedal Position Sensor/Switch "A" Circuit Malfunction
• P0121 – Throttle/Pedal Position Sensor/Switch "A" Circuit Range/Performance
• P0122 – Throttle/Pedal Position Sensor/Switch "A" Circuit Low Input
• P0123 – Throttle/Pedal Position Sensor/Switch "A" Circuit High Input

The most common symptom of a faulty TPS is hesitation whenever the accelerator is pressed. The vehicle may jerk or stumble because the malfunctioning sensor is not sending proper data about the position of the throttle, causing an imbalance in the air-fuel mixture needed for regular acceleration.

A faulty TPS can cause the engine idle speed to fluctuate unpredictably. The idle may be too high or too low, leading to rough idling or "hunting" RPMs.

Since the ECU relies on throttle position data to determine the correct air-fuel ratio, a defective sensor may cause incorrect fuel trims, leading to poor fuel consumption.

A failing TPS can cause a noticeable lack of power or poor acceleration response. The vehicle may feel sluggish or struggle to reach speed.

The engine may stall unexpectedly—particularly when stopping or at idle—as the ECU receives incorrect throttle position signals and fails to maintain proper air or fuel delivery.

The vehicle may experience surging or "bucking" while accelerating, as the ECU receives fluctuating throttle position signals.

A malfunctioning TPS can cause harsh, delayed, or erratic shifting in automatic transmissions. The ECU uses TPS data as one of the inputs for shift timing; incorrect data can lead to aggressive or late shifts.

In some cases, a failing TPS may cause the vehicle to be unable to exceed a certain speed limit.

A faulty TPS may cause the vehicle to accelerate unexpectedly without driver input.

• Wear and tear – Internal potentiometer tracks wear over time due to repeated throttle movements
• Carbon buildup – Excessive carbon deposits on the throttle body can cause the sensor to stick or provide inaccurate readings
• Physical damage – Impact or mechanical stress can damage the sensor housing or internal components
• Open or short circuit – Wiring issues in the sensor circuit
• Moisture ingress – Liquid intrusion can cause corrosion and electrical shorts

When sourcing or purchasing the Throttle Position Sensor MD614734, consider the following factors to ensure optimal performance and compatibility:

Always confirm that the part number on your existing sensor matches MD614734. Related numbers include MD614772, MD614733, and MD614735. Cross-check the OE reference number against the number found on your current unit before purchasing. The part number will appear on the component itself.

Ensure the sensor is compatible with your specific vehicle make, model, year, engine size, and transmission type. This sensor is primarily designed for Mitsubishi vehicles including Carisma, Colt, Eclipse, Galant, Lancer, Mirage, Pajero, and Space Wagon. Selecting the wrong sensor can lead to poor engine response or persistent check engine light issues.

Verify that the sensor features a 4-pin rectangular connector with clockwise rotation and 2 mounting bores. Confirm that the sensor is supplied without cable. The sensor features a 4-pin connector configuration.

Confirm that the connector type and pin configuration match your vehicle's wiring harness. This sensor features a rectangular 4-pin connector with 2 mounting bores.

Look for sensors constructed with durable high-temperature plastic composite materials. High-quality sensors feature robust housings that withstand harsh engine bay conditions, ensuring long-lasting reliability. The sensor should offer ±1% accuracy over the full operating range.

Prioritize sensors with an operating temperature range of -40°C to +125°C, ensuring reliable performance in extreme engine bay conditions.

Prioritize products that meet or exceed OEM standards and automotive industry safety and durability standards. Parts that match the same OE specification used by the vehicle manufacturer ensure proper fit and function.

When sourcing from suppliers, evaluate their quality assurance processes and production capacity. Look for evidence of:

• Strict quality control standards meeting OEM specifications
• 100% factory testing
• Full manufacturer traceability
• Warranty coverage (many suppliers offer 1-year warranties)

The sensor features a compact design with 2 mounting bores for secure installation. During installation, ensure that:

• The sensor is properly aligned with the throttle shaft
• Mounting screws are tightened to the correct torque specification
• The connector is securely fastened (4-pin rectangular connector)
• Sensor wires are not routed over sharp edges
• Proper clearance is maintained from ignition HT leads, coil leads, and other sources of electrical interference

After installation, it is recommended to verify the sensor operation using a diagnostic scan tool. Check that the throttle position readings are smooth and consistent throughout the full range of throttle movement and that the warning light is no longer illuminated.

Consider products that come with warranty coverage and technical support. A warranty can provide assurance of product quality and reliability. Many suppliers offer a 1-year warranty on TPS products.

• The sensor is a potentiometer-type device that provides continuous variable resistance output proportional to throttle position
• The sensor features a 4-pin rectangular connector with clockwise rotation direction
• The sensor converts throttle position into a voltage signal input to the ECU
• The sensor is mounted on the throttle body and detects the throttle valve opening angle
• The sensor transmits two signals (VTA1 and VTA2) to the ECU; deviation in voltage output between these signals indicates a malfunction
• The sensor operates in extreme temperatures ranging from -40°C to +125°C
• The sensor offers ±1% accuracy over the full operating range
• Proper calibration is essential for accurate throttle response; voltage verification using a scan tool is recommended after installation
• This sensor is an Original Equipment (OE) number for Mitsubishi vehicles, meaning it matches the number of the complete component or sub-assembly that was originally fitted to the vehicle
• Replacing worn components on schedule preserves your vehicle's safety, reliability, and resale value