P00B7 - OBD Trouble Code

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When a P00B7 trouble code sets, you may notice that the radiator fans are running at high speed at all times when the engine is running. This is due to the fact that the ECM has detected a large enough difference in temperature between the ECT and RCT to conclude that coolant flow is too low, so it switches the radiator fans to high, to prevent engine overheating.

OBD-II Code P00B7 is defined as a Engine Coolant Flow Low/Performance

A P00B7 - Engine Coolant Flow Insufficient trouble code can set when the ECM detects a temperature difference of more than 68°F between the radiator coolant temperature sensor (RCT) and the engine coolant temperature sensor (ECT). The ECM monitors both sensors to determine whether the electrically heated thermostat is allowing sufficient coolant flow to keep the engine at operating temperature.

What causes the problem with the Engine Coolant Flow Low Performance?

• Faulty/Defective Engine Coolant Temperature Sensor
• Faulty Radiator Coolant Temperature Sensor
• Thermostat Is Stuck
• Low Coolant Level
• Bad Wiring/Connections in The Coolant Temperature Sensor(S) Circuit
• Faulty Powertrain Control Module or programming error
• Problem of Shorted/Open Circuits and faulty wiring and connectors
• Coolant Reservoir Cap Failure

1. Coolant Temperature Sensor - The Coolant Temperature sensor is critical to many PCM functions such as fuel injection, ignition timing, variable valve timing, and transmission shifting. The Coolant Temperature sensor is located in a coolant passage in the engine usually near the thermostat. Replace faulty sensor now!
2. Powertrain Control Module - P00B7 error code also relates to problems with the powertrain. Find all the PCM related parts with us.
3. Auto Switches & Sensors - Common causes behind that P00B7 error code can be defective switches or faulty sensors. So, it will be a good decision to replace them now.
4. Diagnostic Tool - In order to detect the error, one needs high grade diagnostic tools. Visit us today to grab amazing deals.
5. Thermostat - Its job is to block the flow of coolant to the radiator until the engine has warmed up. When the engine is cold, no coolant flows through the engine. By letting the engine warm up as quickly as possible, the thermostat reduces engine wear, deposits and emissions. Replace damaged thermostats now!

It is important to notice the symptoms before going for any type of diagnosis. Different symptoms can lead to an entirely different problem and an entirely different faulty component. Thus, proper tools need to be used by a technician to examine the vehicle before coming to the conclusion.

Common Symptoms

• Illumination of Check Engine Light
• Rough Idle and lack of engine response
• Vehicle starts to run rich (More Fuel in The Air/Fuel Mixture)
• Increased fuel consumption
• Continuous running of Radiator Cooling Fans
• Engine Overheating due to Poor Heater Performance
• Increased Rich Exhaust

Some of the common fixes that can be used to counter the OBD Error Code P00B7 are as follows;

• Ensure that the coolant is filled to a proper level
• Replace the Engine Coolant Temperature sensor and/or Radiator Coolant Temperature Sensor if found faulty
• Replacement of damaged or faulty thermostat
• Repair or replacement of damaged wirings and connectors to the sensors
• Replacement or reprogramming of the PCM
• Checks for open circuits and connectors

However, if you face any of these issues, find best quality replacement parts, exhaust manifolds, gaskets and more at the best prices.

P00B7 is properly diagnosed with an advanced scan tool capable of factory sensor readings (not just one from an auto parts store). A qualified technician can read the data from the advanced scan tool to determine when the problem occurred, or if it is still occurring. They may clear the code/light and test drive the vehicle while monitoring the scan tool data to see if the fault returns or is present.

Based upon the conditions of the test, possibly clearing the code, and road testing the car while monitoring the data, further diagnosis may be required. Diagnosis may require multiple tools such as:

• A technician typically begins by hooking the vehicle up to an OBD-II scanner in order to verify that the code is present, and check for other codes.
• This data along with freeze frame data is recorded, and the codes are then cleared to see if they reoccur.
• Next, there should be a visual inspection of the wiring and connectors to check for loose connections, corrosion, or shorts.
• Replacement of Damaged wiring/connections to the ECT/RCT.
• Repair faulty PCM sensor that may require reprogramming.
• Replace Leaky and damaged intake/inlet pipe immediately
• Faulty thermostat needs replacement as it directly hampers the engine performance.

Common Mistakes When Diagnosing OBD Code P00B7

By far, the most common cause of a P00B7 being stored is a disconnected sensor connector on. When the connector is checked or replaced, the ECT is often left disconnected. If your vehicle has recently been service, and a code P00B7 is suddenly stored, suspect that the IAT sensor has simply been left unplugged.

Some of the common mistakes done while changing diagnosing the OBD code P00B7 are:

• Directly replacing the ECT without evaluation
• Simply replacing the Powertrain Control Module (PCM) without considering other possibilities of problem
• Not checking the damaged or loosened wiring and circuit problems