Cars · Wiring

P05 OBD1 ECU Reference

Overview of the Honda P05 OBD1 ECU, originally found in 1992–1995 Civic CX (D15B8) models.

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The P05 is a 92-95 OBD1 ECU originally equipped in the Honda Civic CX (D15B8 engine). It is notable for its fuel-economy-focused design, featuring a close-coupled catalytic converter and 1-wire O2 sensor configuration, making it the OBD1 successor to the 88-91 HF engine management system.


Technical Specifications

  • Engine: D15B8 (SOHC non-VTEC)
  • Application: 1992–1995 Civic CX
  • Emissions: Designed for close-coupled catalytic converter operation.
  • O2 Sensor: 1-wire configuration.

This ECU is primarily sought after for its fuel-efficient calibration, though it is less common for high-performance tuning compared to VTEC-capable ECUs like the P28.

Applies to

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