What does open loop due to insufficient temperature mean?
The fuel system cannot deliver the proper fuel mixture if is stuck in open loop. If the engine fails to go into closed loop after it has warmed up or been driven, it may have a faulty coolant sensor or an open thermostat.
What are the signs of a bad coolant temperature switch?
Symptoms of a bad or failing coolant temperature switch (sensor)
- Poor fuel economy. One of the first symptoms associated with a problem with the coolant temperature sensor is poor fuel economy.
- Black smoke from engine.
- Overheating engine.
- Check Engine Light comes on.
How do I fix code P0125?
How do I fix trouble code P0125?
- Verify the coolant level.
- Check the thermostat to ensure it is opening properly.
- Inspect the coolant system for leaks and bad wiring.
- Use a voltage meter or infrared thermometer to continue diagnosing the problem.
- Replace faulty components.
What is diagnostic trouble codes on cars?
DTC (diagnostic trouble codes), also known as OBDII codes, are your car’s system for alerting you of vehicle issues. There are typically limits for each system within your vehicle. Trouble codes can tell you about any system issues within your vehicle, including airbags and brakes.
What causes open loop?
Open Loop – Drive, also known as fuel enrichment, occurs during heavy acceleration and WOT. On a two bank vehicle Closed Loop – Fault is when one bank O2 sensor or A/F sensor has a fault. This can be caused by a bad sensor or by one bank being extremely rich or extremely lean.
What causes code P0125?
The P0125 code indicates a problem in the cooling system, likely with the Engine Coolant Temperature (ECT) sensor. It could be one or more of the following problems: Defective ECT sensor. Damage to the ECT sensor.
What does a code p0125 mean on a car?
A code P0125 may mean that one or more of the following has happened: Insufficient warm up time Low engine coolant level Leaking or stuck open thermostat Faulty coolant temperature sensor The simplest thing to do is to reset the code and see if it comes back.
What is the diagnostic code for insufficient coolant?
P0125 OBD-II Trouble Code: Insufficient Coolant Temperature for Closed Loop Fuel Control. Cost of diagnosing the P0125 code. P0125 is a diagnostic trouble code (DTC) for “Insufficient Coolant Temperature for Closed Loop Fuel Control”.
What does insufficient coolant temperature for closed loop fuel control mean?
Insufficient Coolant Temperature For Closed Loop Fuel Control What the P0125 code means P0125 is the OBD-II generic code for the engine computer, or Engine Control Module (ECM), not detecting enough heat in the cooling system before the fuel management system can take control.
What is the DTC for insufficient coolant temperature?
The ECM will set a diagnostic trouble code (DTC) in memory and may or may not command the malfunction indicator lamp (MIL) to illuminate. DTC P0125 is defined as “Insufficient Coolant Temperature for Closed Loop Fuel Control.” What are the common causes of code P0125 ?