Code Definition

P1195 — EGR Boost Sensor Circuit

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Mazda

About P1195

P1195 is a manufacturer-specific powertrain diagnostic trouble code recorded for Mazda vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P1195 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.

P1195 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The EGR boost sensor is a pressure sensor that monitors the vacuum or pressure signal used to control and verify exhaust gas recirculation (EGR) flow, allowing the Powertrain Control Module (PCM) to confirm the EGR valve is responding to commands. DTC P1195 sets when the PCM detects the EGR boost sensor signal is out of range or implausible for the commanded EGR condition, indicating a sensor, vacuum supply, or wiring fault in the EGR boost circuit. Because EGR affects combustion temperature and emissions, a fault here can disturb driveability and emissions output. The driver may notice rough ...

Join TaT to view the complete code information and diagnostic details.

Quick Facts