Walker 211-2054 Engine Coolant Temperature Sensor

Engine Coolant Temperature Sensor for Toyota Yaris

Walker 211-2054 is a sensor-only engine coolant temperature sensor built to deliver accurate temperature feedback to the ECM. It supports fuel injection, ignition timing, cold start enrichment, and cooling fan control, helping the engine management system respond correctly to changing coolant temperatures.

Compatible with 2019 Toyota Yaris, 2017-2018 Toyota Yaris iA, and 2016 Scion iA, this Walker Sensor Only part number 211-2054 is a direct-fit replacement for engine block mounting locations. The rectangle female connector and 2-blade terminal design match the factory-style electrical connection for straightforward service.

Key Features

• Engine coolant temperature sensor for ECM temperature input
• Direct-fit Sensor Only design for factory-style replacement
• Rectangle connector with female terminal housing
• 2 blade terminals for OE-style electrical connection
• Built with heat-resistant materials for coolant system exposure
• Engine block location application
• Walker part number 211-2054

Product Details

Walker Products engineers this coolant temperature sensor to match OE resistance values, thermal response, and signal output so the ECM receives stable temperature data. That accuracy matters on Toyota Yaris and Scion iA applications because coolant temperature affects drivability, emissions control, fan operation, and cold-start behavior. If you are replacing a failed sensor or diagnosing a check engine light, Walker 211-2054 provides a direct replacement path without modification.

This part cross-references AMS Automotive 4138 for the same application.

Common Issues This Sensor Can Address

• Check engine light related to coolant temperature signal faults
• Incorrect fuel mixture during cold starts
• Delayed or erratic radiator fan operation
• Poor idle quality after startup
• Inaccurate temperature readings reported to the ECM

Installation Notes

Verify the engine block mounting location and connector style before installation. Inspect the harness connector for corrosion, damaged terminals, or coolant contamination, and confirm the sealing surface is clean before fitting the new sensor. Because this is a sensor-only part, no wiring harness is included.

Quality Assurance

Walker Products builds this sensor to OE specifications for resistance, thermal response, and signal output to support reliable integration with factory systems. The durable construction is intended to withstand constant coolant exposure, vibration, and temperature swings in daily service.