Code Definition

P006B — MAP Exhaust Pressure Sensor Mismatch

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

About P006B

P006B 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 P006B is stored, the module has detected a sensor-related fault — the reported value from the named sensor is out of spec.

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 P006B 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 P006B fault code is set when the Engine Control Module (ECM) detects a discrepancy or lack of correlation between the Manifold Absolute Pressure (MAP) sensor readings and the exhaust pressure sensor readings. This code is particularly concerned with the relationship between the pressure in the intake manifold and the pressure in the exhaust system. The MAP sensor measures the pressure within the intake manifold, while the exhaust pressure sensor gauges the pressure within the exhaust system. These readings are crucial for the ECM to accurately manage engine performance, emissions control, ...

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