PowertrainP0125

Caution

Severity: Caution - get it checked when you can

Insufficient Engine Coolant Temperature for Closed Loop Fuel Control

41 brands affected · Generic SAE J2012 description.

Key terms: Control module: a small computer that runs one part of the car · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions

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

1What it means in plain English

The coolant is not reaching the temperature needed for the engine computer to switch to normal closed-loop fuel control, usually because the thermostat is stuck open or the coolant temperature sensor is wrong.

2Common causes

Stuck-open thermostat
Faulty coolant temperature sensor
Low coolant level
Damaged wiring or connector
Engine control module fault

3Can I drive?

Caution · drive with care

Have it checked soon; fuel economy and heater performance may suffer. If the temperature gauge climbs into the red or the engine overheats, stop safely and let it cool.

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 41

Brand	Code	Description	System
Ashok Leyland CV	P0125	Insufficient Engine Coolant Temperature for Closed Loop Fuel Control SAE	Powertrain
BAIC Motor	P0125	Closed loop control coolant temperature not reached Brand	Powertrain
Mercedes-Benz	P0125	Insufficient Engine Coolant Temperature for Closed Loop Fuel Control SAE	Powertrain
BMW	P0125	Coolant temperature implausible Brand	Powertrain
BYD	P0125	Excessive time closed loop Brand	Powertrain
Chery	P0125	Excessive time closed loop Brand	Powertrain
Daewoo	P0125	Engine Coolant Temperature Sensor Circuit Malfunction Brand	Powertrain
Daihatsu	P0125	F/B abnormal Brand	Powertrain
DFFS	P0125	Coolant temperature sensor fault Brand	Powertrain
DFFX	P0125	Excessive time closed loop Brand	Powertrain
DFXK	P0125	Closed-loop control water temperature not reached Brand	Powertrain
EOBD	P0125	Insufficient coolant temperature for closed loop fuel control Brand	Powertrain
Ford	P0125	Insufficient Engine Coolant Temperature for Closed Loop Fuel Control SAE	Powertrain
Geely	P0125	Excessive time closed loop Brand	Powertrain
GM	P0125	Insufficient Coolant Temperature for Closed Loop Fuel Control Brand	Powertrain
Great Wall	P0125	Excessive time closed loop Brand	Powertrain
Hafei	P0125	Excessive time closed loop Brand	Powertrain
Holden	P0125	Engine Coolant Temperature Insufficient for Closed Loop Fuel Control Brand	Powertrain
Honda	P0125	Insufficient Engine Coolant Temperature for Closed Loop Fuel Control SAE	Powertrain
Hyundai	P0125	Insufficient Engine Coolant Temperature for Closed Loop Fuel Control SAE	Powertrain
Isuzu	P0125	Insufficient Engine Coolant Temperature for Closed Loop Fuel Control SAE	Powertrain
Land Rover	P0125	Insufficient Engine Coolant Temperature for Closed Loop Fuel Control SAE	Powertrain
Mahindra	P0125	Insufficient Engine Coolant Temperature for Closed Loop Fuel Control SAE	Powertrain
Mazda	P0125	Insufficient Engine Coolant Temperature for Closed Loop Fuel Control SAE	Powertrain
Mitsubishi	P0125	A/F feedback Brand	Powertrain
Nissan	P0125	ECT sensor Brand	Powertrain
Opel	P0125	Insufficient Coolant Temperature for Closed Loop Fuel Control Brand	Powertrain
Perodua	P0125	F/B abnormal Brand	Powertrain
Peugeot	P0125	Insufficient Engine Coolant Temperature for Closed Loop Fuel Control SAE	Powertrain
Porsche	P0125	Insufficient Engine Coolant Temperature for Closed Loop Fuel Control SAE	Powertrain
Proton	P0125	A/F feedback Brand	Powertrain
Saab	P0125	Insufficient Coolant Temperature for Closed Loop Fuel Control Brand	Powertrain
MG (SAIC)	P0125	Insufficient Coolant Temperature for Closed Loop Fuel Control Brand	Powertrain
Smart	P0125	Insufficient Engine Coolant Temperature for Closed Loop Fuel Control SAE	Powertrain
Sprinter	P0125	Insufficient Engine Coolant Temperature for Closed Loop Fuel Control SAE	Powertrain
Subaru	P0125	Insufficient Coolant Temperature for Closed Loop Fuel Control Brand	Powertrain
Suzuki	P0125	Insufficient coolant temperature for closed loop fuel control Brand	Powertrain
SWM Motor	P0125	water temperature does not meet fuel closed loop conditions Brand	Powertrain
Tata	P0125	Insufficient Coolant Temperature For Closed-Loop Brand	Powertrain
Toyota	P0125	Closed loop control coolant temperature not reached Brand	Powertrain
Volkswagen	P0125	Insufficient Coolant Temperature for Closed Loop Fuel Control Brand	Powertrain

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.

5Extended variant codes 2

These 7-character codes are manufacturer-specific variants of P0125 and may be reported by some scan tools.

Brand	Code	Description	System
Hyundai	P012500	No description available	Powertrain
SsangYong	P012500	Insufficient coolant temperature for closed loop f/control Brand	Powertrain

6Related codes

Browse Pxxx codes or P012xx codes.