Code Definition

P1171 — Rotor Sensor Fault

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

About P1171

P1171 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 P1171 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.

P1171 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 a malfunction in the rotor position sensor. This sensor is typically found in distributor-based ignition systems or certain fuel injection systems, where it helps determine engine position for proper fuel and spark timing. A fault in this sensor can lead to misfires, rough running, or starting issues.

Quick Facts