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P91 OBD1 ECU Reference

Technical reference for the P91 OBD1 ECU found in 1992-1995 JDM Honda Civic Coupe models equipped with the 1.6L SOHC VTEC engine.

Beginner 4

blundar Author

The P91 is an OBD1 engine control unit (ECU) utilized in 1992–1995 JDM Honda Civic Coupe models equipped with a 1.6L SOHC VTEC engine.

Identification

Use the following visual references to identify the P91 ECU and its internal board layout.

P91 Identification
External identification markings on the P91 ECU casing
P91 Top View
Top view of the P91 PCB layout
P91-900 PCB
Detailed view of the P91-900 variant PCB
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Note

The P91 is specific to JDM (Japanese Domestic Market) configurations. Ensure compatibility with your specific wiring harness and engine sensor suite before installation.

Technical Specifications

  • OBD Standard: OBD1
  • Market: JDM (Japan)
  • Engine Application: 1.6L SOHC VTEC
  • Chassis Application: 1992–1995 Civic Coupe

Applies to

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Cars 1 link

Honda

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Model Civic
Direct taxonomy match