Code Definition

P1117 — ECT Sensor Signal Intermittent

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

About P1117

P1117 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 P1117 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.

P1117 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

DTC P1117 is set when the Powertrain Control Module (PCM) detects an intermittent or erratic signal from the Engine Coolant Temperature (ECT) sensor. The ECT sensor is a negative temperature coefficient thermistor that returns a voltage corresponding to coolant temperature, which the PCM relies on for fuel control, ignition timing, idle speed, cooling fan operation, and emissions strategy. An intermittent fault means the signal momentarily jumps, drops out, or returns implausible values before recovering, usually pointing to a connection or wiring problem rather than a hard failure. Drivers ma...

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

Quick Facts