What causes P1636 on a Honda?

Internal power transistor failure inside the MPI module Overheating of the inverter from blocked cooling airflow Voltage spike damage from a failing DC-DC converter Coolant leak reaching the inverter electronics on liquid-cooled units Aging solder joints cracking inside the inverter module

How do I fix P1636 on a Honda?

Check the inverter cooling path and IMA fuses first Inspect for coolant intrusion or heat discoloration at the inverter Confirm the fault with a Honda HDS scan tool after a full power cycle Follow Honda high-voltage safety precautions before servicing Replace the inverter module when the internal fault is confirmed

P1636 Motor Power Inverter Module Internal Circuit Malfunction

Q: What does P1636 mean on a Honda?

P1636. Motor Power Inverter Module Internal Circuit Malfunction. Applies to Insight, Civic Hybrid with IMA.

Category: Powertrain - Hybrid Propulsion
Severity: Check Engine Light
Applies to: Insight, Civic Hybrid with IMA

What does P1636 mean on a Honda?

P1636. Motor Power Inverter Module Internal Circuit Malfunction. This Honda-enhanced code applies to Insight, Civic Hybrid with IMA.

Common causes of P1636

Internal power transistor failure inside the MPI module
Overheating of the inverter from blocked cooling airflow
Voltage spike damage from a failing DC-DC converter
Coolant leak reaching the inverter electronics on liquid-cooled units
Aging solder joints cracking inside the inverter module

How to fix P1636

Check the inverter cooling path and IMA fuses first
Inspect for coolant intrusion or heat discoloration at the inverter
Confirm the fault with a Honda HDS scan tool after a full power cycle
Follow Honda high-voltage safety precautions before servicing
Replace the inverter module when the internal fault is confirmed

Sources and review

Last updated 2026-09-07.