Hybspec

C0340

Wysoki

Lateral acceleration sensor circuit fault (lateral accelerometer) – incorrect signal or no communication with the ABS/ESC module. The code concerns the traction control and stability control systems.

OBD-II (EN): Lateral Acceleration Sensor Circuit Malfunction

Code C0340 signals a problem with the lateral acceleration sensor (lateral accelerometer), which is a key component of the ESC/ESP stability control system. It manifests as the deactivation of ABS and stability control and the illumination of the corresponding warning lights. We recommend immediate diagnosis at a workshop – driving with a faulty ESC system significantly increases the risk of an accident, especially in difficult road conditions.

Symptoms

ABS and/or ESP/ESC warning light on the dashboard; deactivation of the traction control (TCS) and stability control (ESC) systems; reduced vehicle stability during dynamic cornering; possible incorrect operation of the ABS brake system; in advanced cases, no response from the stability system when exiting a skid.

Possible causes

• Damaged or contaminated lateral acceleration sensor (lateral accelerometer) • Open or short circuit in the wiring harness powering the accelerometer sensor • Corrosion or loosening of the sensor/ESC module electrical connector • Defect in the ABS/ESC control module (less common) • Incorrect installation or mechanical displacement of the sensor (e.g., after a collision or body repair)

Affected systems

ABS (Antilock Braking System)ESC / ESP (Electronic Stability Control)TCS (Traction Control System)Układ hamulcowyCzujnik przyspieszenia lateralnego

Related codes

Does code C0340 require professional diagnostics?

The code alone is not enough. To find the cause, you need to read live data, check freeze frame conditions, and compare with vehicle behavior. Book a diagnostic session.