Code Definition

P1173 — Rotor Calibration Fault

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

About P1173

P1173 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.

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.

P1173 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 code sets when the powertrain control module (PCM) detects an issue with the calibration of the rotor position in a distributor-based ignition system or certain fuel injection setups. Proper rotor calibration is essential for accurate ignition timing and fuel delivery. A fault in this system can lead to misfires, poor performance, or difficulty starting.

Quick Facts