Walker 242-1339 Ignition Knock (Detonation) Sensor

Ignition Knock Sensor for OE-Style Engine Control

Walker 242-1339 is a sensor-only ignition knock sensor built for OE replacement use on select Hyundai and Kia applications. It monitors engine vibration so the ECU can adjust ignition timing when detonation is detected, helping maintain smooth operation and protect internal engine components.

Walker Sensor Only products focus on direct-fit replacement sensors with factory-style electrical connections and OE-matched operating characteristics. This part number, 242-1339, is engineered for accurate knock detection on vehicles such as the Hyundai Elantra, Hyundai Sonata, and Kia Forte.

Key Features

• OE replacement ignition knock (detonation) sensor
• Matches OE frequency range, sensitivity, and electrical output
• Spade terminal design with 1 oblong female connector
• 2 male terminals for factory-style connection
• Built with heat- and oil-resistant materials for engine-bay conditions
• Sensor-only design for direct replacement of the original unit

Detailed Description

Walker 242-1339 is designed to detect the resonant vibration pattern associated with engine knock, allowing the control system to reduce spark advance in real time. That response helps prevent spark knock, which can contribute to reduced fuel economy, drivability concerns, and engine damage if left unresolved. The sensor is tuned for the specific frequency range required by the application and installs in the original threaded location with a factory-style electrical interface.

Compatible With select Hyundai and Kia vehicles, including 2017-2020 Hyundai Elantra, 2015-2019 Hyundai Sonata, 2020-2024 Kia Forte, and 2016-2020 Kia Optima. This part number, 242-1339, is also listed for Hyundai Kona, Veloster, Tucson, Elantra GT, and Kia Seltos, Soul, Forte5, and Forte Koup applications.

Common Issues This Part Can Address

• Knock sensor fault codes such as P0325 or P0330
• Erratic ignition timing caused by inaccurate knock detection
• Engine pinging or spark knock under load
• Reduced drivability from a failed or out-of-range sensor signal
• Fuel economy loss related to timing correction issues

Installation Notes and Tips

Verify the connector style, terminal count, and threaded mounting location before installation. Because this is a sensor-only part, confirm that the original harness connector and mounting point are in good condition. For best results, clear any stored diagnostic trouble codes after installation and confirm proper operation with a scan tool.

Quality Assurance

Walker Products builds this knock sensor as an OE replacement component with application-specific tuning for frequency response and electrical output. The design uses heat- and oil-resistant materials to withstand the conditions found at the engine block and cylinder head.