Causes and Fixes P00B7 Engine Code Chevy Cruze

By | July 25, 2022

Causes and Fixes P00B7 Engine Code Chevy Cruze
If you have a Chevy Cruze with a P00B7 engine error code, it points to an overheating issue.

The problem is usually the coolant system with several components that can cause a P00B7 OBDII error code.

What is a P00B7 Engine Error Code on a Chevy Cruze?

A P00B7 Engine Error Code is a “P00B7 Engine Coolant Flow Low/Performance.”

Some OBDII scan tools will not be able to give a definition and will give a “P00B7 DTC definition is not available”.

The onboard computer (ECM/PCM) is seeing a problem with the engine temperature.

The causes can range from a bad sensor to a low coolant or a failing water pump.

Symptoms of P00B7 Engine Error Code on a Chevy Cruze

  • Overheating
  • No Heat
  • Randomly Stalling
  • AC off due to high temperature message

Causes of a P00B7 Engine Error Code Chevy Cruze

  1. Low Coolant Level
  2. Causes of a P00B7 Engine Error Code Chevy Cruze
    If the coolant level is low, it can cause a P00B7 OBDII error code.

    Often if the coolant is low, there is another issue causing a leak.

    Refiling the coolant and checking where it leaked from, is recommended.

    When an engine overheats, it can also cause coolant to boil out, causing low levels.

  3. Temperature Sensor
  4. A bad or failing temperature sensor can cause an issue.

    Depending on the year of the Chevy Cruze there are usually two temperature sensors.

    One sensor is located on the top of the engine, while the other is located on the radiator.

    Be sure to look at a manual for the year of Cruze to locate the temperature sensors.

  5. Thermostat
  6. A bad thermostat that is stuck closed will cause the engine to overheat.

    Likewise, a stuck open thermostat will not regulate the temperature correctly and cause issues.

    The thermostat is a low-cost item that can be replaced if it has gone bad.

  7. Water Pump
  8. A bad water pump is a cause of a P00B7 OBDII error code.

    If the water pump fails, it will cause the engine to overheat.

    When they do fail, the bottom of the pump will usually drip coolant.

  9. Head Gasket
  10. While the problem is usually something else, a blown head gasket can cause overheating and a P00B7 error code.

    If the head gasket has blown, there is usually coolant in the oil.

    Check the oil to see if there is coolant in it which usually pint to a blown head gasket.

Summary
The Chevrolet Cruze is a great car that many drive daily.

Like all vehicles, it can have problems, one of which is a P00B7 engine OBDII error code.

A P00B7 code indicates there is a temperature issue, usually with the vehicle overheating.

The official definition of a P00B7 code is an “Engine Coolant Flow Low Performance.”

All the components of the coolant system will need to be checked for any failed parts.

This includes the coolant level, water pump, thermostat, and temperature sensor.

In some cases, a gasket may have failed, which can cause it to overheat.

The engine oil will usually have coolant in it when a head gasket has failed.

There are cases when there is no coolant in the oil, and the gasket is bad, but this is rare.

Everything else should be examined first, as replacing a head gasket is a big job.

Have you had issues with a P00B7 engine error code on a Chevy Cruze? Let us know your thoughts below.

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