How to Coolant Flush and Replacement — 2022-2025 Honda Civic

Flushing and replacing the coolant in your 2022-2025 Honda Civic is essential to prevent engine overheating and corrosion, especially as part of routine maintenance every 5 years or 60,000 miles. This DIY repair can save you money with parts costing between $20-$40 compared to a shop cost of $100-$150. With clear instructions and basic tools, most DIYers can tackle this job confidently. DIY Cost: $20-$40 | Shop Cost: $100-$150

You’re done. Clear any stored codes with your scanner and complete a normal drive cycle so the vehicle’s readiness monitors reset.

If the code returns, the root cause likely wasn’t the part you replaced — go back through the diagnostic steps before swapping anything else.