01-05 Civic K-Swap
Wiring Guide
Without a properly working electrical system, our freshly installed K-Series engine won't do much besides looking good in our engine bay.
But what's actually required to change, solder, and re-wire to get a K20 motor firing up in a 01-05 Civic?
Step 1) C101 Plug
This is the main connection between the K-Series engine harness and the chassis harness. It ensures proper communication between the engine's sensors and other systems in your car.

Here, we have to re-locate a bunch of wires since the wiring of the K-Series engine harness differs from the stock D-Series.
Step 2) Oxygen Sensors
The oxygen sensor is part of the exhaust system and measures the amount of oxygen in the exhaust gases. The 01-05 Civic has two of them, one mounted prior to the catalytic converter and one right after.
The second oxygen sensor mounted behind the converter is used to determine the efficiency of the converter itself - converting the toxic exhaust gases of the engine into less-toxic carbon dioxide.
In our K-Swapped Civic, we can simply plug it into its original counterpart of the chassis harness.

When we look at the primary oxygen sensor mounted before the converter, things become more interesting.
This sensor helps the engine control unit calculating the right amount of fuel that gets sprayed into the motor.
Unfortunately, this sensor isn't part of the chassis harness of our Honda Civic. We need to run the wires separately to the ECU.
Besides, we also need to wire in a relay for the heater unit inside the sensor.
Introducing...
The 01-05 Honda Civic K-Swap
Wiring Guide
Learn everything about setting up the electrical system of your Civic K-Swap.
Our guide shows you everything you need to get the electrical wiring working. We guide you through the entire process in extreme detail.
It covers the following topics:
C101 Re-Wiring


Oxygen Sensor Wiring


Heater Relay

ECU Options
The guide covers the two most common used ECU options:
PRB - Acura RSX
PRA -Honda Civic Type-R (EP3)
AN UNBEATABLE GUARANTEE:
TRY OUR 01-05 CIVIC K-SWAP WIRING GUIDE FOR 30 DAYS, 100% RISK-FREE
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That's why we're offering you an unbeatable 30-Day-Money-Back Guarantee.
If you're unsatisfied with the program during your test month, just send us an email and we'll refund you 100% of your price. No questions asked.
Are You Ready For Your K-Swap?
Get the guide NOW and take the first steps towards your dream car:
C101 Plug Wiring
Oxygen Sensor Wiring
PRA-ECU Support
PRB-ECU Support
E-Book
Lifetime Access
If you have any questions, email us at support@kpowered.net.
We're happy to help.
What Do Other Honda Tuners Say?
Júlio
"Already finished my swap and already running without any troubles :-)!! Many thanks for your support."
Nathan
"Thank you for the Info! This really gives me a idea now how and what to do! Really thank you!"
Veselin
"Hello Samuel, You have done a very good job..congratulations!!"
C101 Plug Wiring
Oxygen Sensor Wiring
PRA-ECU Support
PRB-ECU Support
E-Book
Lifetime Access
If you have any questions, email us at support@kpowered.net.
We're happy to help.