p00b7 Code - Engine Coolant Flow Low/Performance (2024)

FAQs

P00b7 Code - Engine Coolant Flow Low/Performance? ›

DTC P00B7 stands for “Engine Coolant Flow Low/Performance.” This code is logged when the PCM perceives insufficient coolant flow through the cooling system. Code P00B7 is commonly caused by low coolant levels, faulty thermostats, bad water pumps, or malfunctioning ECT sensors.

You may have low coolant levels, cooling system issues, such as a faulty thermostat or bad water pump, a stuck thermostat, a defective radiator coolant temperature sensor, fouled wiring, a broken Engine Coolant Temperature (ECT) sensor, or even overall PCM failure.

The P00B7 is stating the coolant flow is insufficient. There are a few things to look for here. So, first, make sure the cooling system is filled to the correct level. Make sure the radiator cooling fans are coming on in a timely manner.

DTC P00B7 stands for “Engine Coolant Flow Low/Performance.” This code is logged when the PCM perceives insufficient coolant flow through the cooling system. Code P00B7 is commonly caused by low coolant levels, faulty thermostats, bad water pumps, or malfunctioning ECT sensors.

Once the engine has cooled down, slowly open the coolant reservoir cap, allowing any remaining pressure to be released. Once the pressure has subsided, you can remove the cap fully, check the level of the coolant and top up as required.

You should avoid driving if your car is returning a P2181 code. Because it can be anything from a faulty sensor to a serious overheating problem, it's best to have an expert look at your car and ensure the problem isn't potentially fatal before you start driving with the code.

An engine coolant temperature sensor measures the temperature of your engine coolant, in order to tell the engine fuel unit (ECU) when to adjust the fuel injection and ignition timing. The coolant temperature sensor works within your vehicle's ECU, by sending regulated voltage to the sensor.

The P0118 code refers to issues with the Engine Coolant Temperature (ECT) circuit and its accompanying sensor. The ECT is a thermistor, or an electrical resistor, whose resistance is significantly reduced by heating. The ECT is located in the coolant passage in your engine's cylinder head.

One way to check for proper coolant circulation is to check the upper and lower radiator hoses. The upper radiator hose should be hot, around 190–200 °F.

Why does my car keep saying engine coolant low? ›

What causes the engine coolant warning light to come on? The light could be caused by several factors, but the most likely is either a loss of coolant or a fault with the sensor. A coolant loss could be caused by a leak somewhere in the system, such as a split hose or a hole in the radiator.

If the coolant level is dropping and there is no external leak evident, then the coolant is probably leaking internally, into the engine. If the car has recently overheated then this could have caused the head gasket to fail.

In most vehicles, the coolant level sensor is found in the coolant reservoir, coolant overflow bottle or expansion tank, or the radiator. Radiator-mounted sensors are often installed inside the cooling device if the vehicle was manufactured before 2010.

What are the symptoms related to a bad oxygen sensor? A faulty oxygen sensor is one of the most common causes of a check engine light. Symptoms may include a decrease in fuel mileage, hesitation or misfiring from the engine, rough idling or even stalling. A faulty sensor may cause the vehicle to fail an emissions test.

The obd-ii code p00b7 on a 2013 chevy malibu is defined as a engine coolant flow low/performance.

However, when the coolant level falls below the recommended level, it can lead to a series of problems that not only compromise the vehicle's performance but also pose a risk of causing irreversible damage to the engine.

This issue could be caused by a faulty thermostat, an obstruction in the radiator, a fan or the water pump has malfunctioned preventing the coolant from flowing and dissipating heat as intended.