# P0117 — ECT Sensor Circuit Low

> ClearTheCode diagnostic code reference (not OEM service data).

Source: https://clearthecode.com/codes/P0117

**System:** Powertrain · Cooling System

**Severity:** minor

## Description

ECT signal stuck low. Inspect wiring and sensor.

## Diagnostic snapshot

- **Difficulty:** 6/10 — Intermediate diagnostics
- **Est. repair cost:** $120 – $450

## Diagnostic workflow

1. Confirm P0117 with a live scan — note pending vs stored and freeze frame data.
2. Inspect wiring/connectors and related sensors before replacing modules.
3. Clear codes and road-test; re-scan after two drive cycles if the monitor must set.