System0301

Caution

Severity: Caution - get it checked when you can

Coolant temp. sensor ckt malf (High Voltage)

1 brand affected · Description from Suzuki data.

Key terms: Control module: a small computer that runs one part of the car

Safety: This code relates to engine cooling or temperature. Overheating can damage the engine.

1What it means in plain English

The vehicle has stored a diagnostic fault code. The exact meaning depends on the make and model, so a brand-specific source may be needed.

2Common causes

Sensor or actuator fault
Wiring or connector fault
Mechanical wear
Low battery or charging voltage
Control module fault

3Can I drive?

Caution · drive with care

Watch the temperature gauge. Stop safely and let the engine cool if the gauge climbs, steam appears, or a red warning light comes on.

This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.

4Brand data 1

Brand	Code	Description	System
Suzuki	0301	Coolant temp. sensor ckt malf (High Voltage) Brand	System

Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.

5Related codes

Browse 0xxx codes or 0301xx codes.