Rectangular Throttle Position Sensor Assembly For Chrysler MD628077

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 Throttle Position Sensor MD628077 is an Original Equipment (OE) number primarily associated with Mitsubishi vehicles. It is identified by the following OE reference numbers and cross-references:

Manufacturer OE References:

• Mitsubishi: MD628077

• Dodge/Chrysler: MD628077

• MOPAR: MD628077

Common Reference Designations:

• Throttle Position Sensor (TPS)

• Sensor, Throttle Body

• Throttle Position Sensor Assembly

The Throttle Position Sensor MD628077 is designed for compatibility with a wide range of Mitsubishi, Dodge, and Chrysler vehicles.

Important Compatibility Notes:

• This sensor is an Original Equipment (OE) number for Mitsubishi, Dodge, and Chrysler 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

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. 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 fails to send proper throttle position data, causing an imbalance in the air-fuel mixture needed for smooth 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.

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 throttle may become unresponsive or delayed when the accelerator pedal is pressed. This occurs because the ECU is not receiving accurate position data to adjust fuel delivery and ignition timing accordingly.

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.

If the throttle position sensor fails completely, it may cause problems such as the engine failing to start normally.

• 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

• 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 MD628077, consider the following factors to ensure optimal performance and compatibility:

Always confirm that the part number on your existing sensor matches MD628077. Related numbers include 3510202760, 5S5091, TH236, TPS4138, EC3262, and SS10495. Cross-check the OE reference number against the number found on your current unit before purchasing.

Ensure the sensor is compatible with your specific vehicle make, model, year, engine size, and transmission type. This sensor is primarily designed for Mitsubishi Eclipse (2000–2005), Galant (1999–2004), Montero, Pajero, Outlander, as well as Dodge Stratus and Chrysler Sebring models. Selecting the wrong sensor can lead to poor engine response or persistent check engine light issues.

Verify that the sensor features a 3-pin rectangular connector with anticlockwise rotation and 2 mounting bores. Confirm that the sensor is supplied without cable. The sensor features a 3-prong blade male terminal configuration.

Confirm that the sensor dimensions (approximately 54.5 x 53 x 23 mm) match your original unit to ensure proper fitment.

Look for sensors constructed with durable automotive-grade materials. High-quality sensors are built to the same dimensional and material standards as the original part they replace, ensuring reliable performance and a long service life.

Prioritize products that meet or exceed OEM standards. Parts that match the same OE specification used by the vehicle manufacturer ensure proper fit and function. Suppliers certified under IATF 16949 demonstrate adherence to rigorous quality management systems.

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 (typically 12 months or 1-year replacement unlimited-mileage warranty)

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 (3-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. Some suppliers offer a 1-year replacement unlimited-mileage warranty.

• The sensor is a potentiometer-type device that provides continuous variable resistance output proportional to throttle position

• The sensor features a 3-pin rectangular connector with anticlockwise 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

• 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, Dodge, and Chrysler vehicles

• The sensor is supplied without cable, requiring the existing wiring harness connector to be in good condition

• Replacing worn components on schedule preserves your vehicle's safety, reliability, and resale value