Code Definition

P00B7 — Engine Coolant Flow - Low or Out of Range

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P00B7

P00B7 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P00B7 is stored, the module has detected a signal or supply voltage lower than the expected operating range; and a plausibility fault — the measured value is in the electrical range but is not consistent with expected operating behaviour.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P00B7 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The fault code P00B7 is set when the Engine Control Module (ECM) detects that the flow of engine coolant is lower than expected or out of the normal operational range. This condition might be identified through sensors that monitor coolant flow directly, or inferred from related parameters like coolant temperature or pressure. Low or out-of-range coolant flow can be due to various reasons, including a malfunctioning water pump, clogged coolant passages, or low coolant levels. Inadequate coolant flow can lead to insufficient engine cooling, potentially causing overheating and engine damage.

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