Walker 211-2191 Engine Coolant Temperature Sensor - Radiator

Engine Coolant Temperature Sensor for GM Applications

Walker 211-2191 is an engine coolant temperature sensor built to deliver real-time coolant temperature data to the ECM. It supports accurate fuel delivery, ignition timing, cold-start enrichment, and cooling fan control for vehicles such as the Chevrolet Equinox, Malibu, Trailblazer, and GMC Terrain.

Walker Sensor Only products focus on the sensor element itself for direct replacement service. Part number 211-2191 is engineered for OE-style resistance values, thermal response, and signal output to integrate with factory engine management systems.

Key Features

• Engine coolant temperature sensor for ECM temperature input
• Pin terminal type with 2 terminals
• Female circular connector design
• Direct-fit replacement for factory-style service
• Heat-resistant construction for coolant and vibration exposure
• Wiring harness not included
• Cross-references Walker 211-2191 for the same application

Detailed Description

This engine coolant temperature sensor monitors coolant temperature and sends that data to the ECM so the system can adjust engine operation in real time. Accurate temperature feedback helps the vehicle manage fuel injection, ignition timing, idle quality, cold-start operation, and radiator fan control. Walker 211-2191 is built to match OE specifications for resistance, thermal response, and signal output, making it a practical replacement for GM vehicles including Chevrolet Bolt EV, Chevrolet Colorado, Buick Encore, and GMC Canyon applications.

Compatible With 2015-2023 Chevrolet Colorado, 2015-2020 GMC Canyon, 2016-2020 Chevrolet Malibu, 2016-2019 Chevrolet Cruze, 2018-2020 Chevrolet Equinox, 2021-2023 Chevrolet Trailblazer, and other listed Buick, Chevrolet, and GMC models. Use part number 211-2191 when replacing a failed coolant temp sensor or diagnosing a check engine light tied to temperature input.

What It Helps Address

• Incorrect coolant temperature readings sent to the ECM
• Hard cold starts or extended warm-up behavior
• Cooling fan operation concerns tied to temperature input
• Rough idle or fuel mixture issues related to sensor data
• Check engine light conditions involving coolant temperature sensor faults

Installation Notes and Tips

• Verify connector shape, terminal type, and terminal count before installation.
• Inspect the cooling system connector and sealing surface for corrosion or damage.
• Some applications note an O-ring included in the fitment listing; confirm the vehicle-specific service requirement before installation.
• Follow factory service procedures for coolant level, sensor removal, and ECM fault code clearing.

Quality Assurance

Walker Products engineers this sensor to OE-style specifications for resistance values, thermal response, and signal output. The durable, heat-resistant design is made for continuous exposure to coolant, vibration, and temperature swings in daily driving conditions.