Error code · Engine

P0125 — Insufficient Coolant Temperature for Closed Loop Fuel Control

Safe to drive

Open this code in the appDownload the app

A fault code doesn’t yet mean the unit or sensor itself is faulty: often it’s the plug and connector leading to it.

Possible causes

What you can do yourself

  1. In winter it also means a cold heater. Usually the thermostat is replaced.

Find the part on Kaspi ShopBefore buying, check the part number or match the part by VIN in the Kaspi “Garage”.

OA case from Oleg’s practice

  • Toyota RAV4 2005 The temperature readings jump: too high one moment, dropping sharply the next; codes P0125, P0171, P0420. The coolant temperature sensor was turning in its base — it needs replacing; for P0171 and P0420 a fuel system check is recommended. How it went ↗

The explanation comes from the error code reference in the AvtoElektrik PRO app.

Need a mechanic’s help?

Couldn’t fix it yourself? Oleg, an auto electrician, does computer diagnostics and repairs: he comes out anywhere in Almaty or sees you at his workshop.

Car computer diagnostics in AlmatyCall: +7 701 121 11 10

Want to figure it out yourself?

Oleg’s course “Car computer diagnostics with a scan tool”: how to hook up a scanner, read codes and live data, and use them to find the cause. The first lessons are free.

Scan tool diagnostics course →

Nearby codes

All codes in P01xx →

Who keeps this reference

The reference is kept by Oleg Dmitriev, an auto electrician from Almaty with 26 years of experience: computer diagnostics of cars and trucks, repair of control units (ECUs). Can’t find the cause? Message him.

Oleg’s auto electrician websiteWhatsApp +7 701 121 11 10