Walker 242-1338 Ignition Knock (Detonation) Sensor

Walker 242-1338 Knock Sensor Overview

Walker 242-1338 is an OE replacement ignition knock sensor for gasoline engines that rely on precise detonation detection and spark timing control. It is built for direct replacement in Acura and Honda applications where accurate knock feedback is needed to maintain smooth operation and protect the engine.

Walker Sensor Only products focus on the sensor element itself, making this line a straightforward choice when the original knock sensor has failed and the factory connector and mounting location are being reused.

Key Features

• OE replacement ignition knock (detonation) sensor
• Engine vibration monitoring for real-time knock detection
• Matched for OE frequency range, sensitivity, and electrical output
• Heat- and oil-resistant construction for engine-block environments
• Factory-style oblong female connector with 2 male terminals
• Direct-thread fitment for original sensor locations

Detailed Description

The Walker 242-1338 knock sensor monitors engine vibration and sends a signal to the ECU so ignition timing can be adjusted when detonation is detected. That response helps reduce spark knock, timing-related drivability problems, and the risk of internal engine damage. The sensor is tuned to the resonant frequency expected for the listed engine platforms, which supports accurate knock detection and stable ignition control.

This part number is used across a wide range of Honda and Acura vehicles, including 2013-2025 Honda Accord, 2013-2025 Honda CR-V, 2016-2025 Honda Pilot, 2015-2025 Honda TLX, and 2022-2025 Acura MDX. It also serves applications such as Honda Civic, Honda Odyssey, Honda Passport, Honda Ridgeline, Acura RDX, and Acura ILX. Walker 242-1338 is a direct-fit sensor for the original threaded mounting point and factory electrical connection.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Knock sensor fault codes such as P0325 or P0330
• Audible spark knock or detonation under load
• Incorrect ignition timing response from the ECU
• Reduced fuel economy caused by knock-related timing retard
• Drivability concerns tied to failed knock detection

Installation Notes and Tips

Install Walker 242-1338 in the original threaded sensor location and connect it to the factory-style 1-connector, 2-terminal harness. Verify the connector shape and terminal layout before installation, and inspect the mounting surface for corrosion, oil contamination, or thread damage that could affect signal quality. Confirm the vehicle application by year, make, and model before ordering.

Quality Assurance

Walker Products builds this sensor to OE specifications for fit, frequency response, sensitivity, and electrical output. The Sensor Only line is engineered for direct replacement use in Honda and Acura knock sensor applications.