Code Definition

P1114 — Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage/IAT - B Circuit Low Input

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

About P1114

P1114 is a manufacturer-specific powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P1114 is stored, the module has detected a signal or supply voltage lower than the expected operating range; and 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.

P1114 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

This fault code is set when the Powertrain Control Module (PCM) detects an intermittent low voltage signal from the Engine Coolant Temperature (ECT) sensor or a low input from the secondary Intake Air Temperature (IAT) sensor (IAT - B). These sensors provide critical data for engine management, affecting fuel injection, ignition timing, and cooling system operation. A low voltage signal often indicates a short to ground or a wiring issue.

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