How do you reset a 1995 Camaro ECU?

There's no single "reset" button on a 1995 Camaro's ECU (Engine Control Unit). The process involves disconnecting the battery to clear the stored adaptive memory. This isn't a true "reset" in the sense of restoring factory settings, but it clears out learned parameters that the ECU has adapted over time. This is often what people mean when they say "reset the ECU."

Here's how to do it:

1. Disconnect the Battery: Locate your battery (usually in the engine bay). First, disconnect the NEGATIVE (-) terminal. This is crucial for safety. Use a wrench to loosen the nut and carefully remove the cable. *Do not disconnect the positive (+) terminal first.*

2. Wait: Wait for at least 10-15 minutes. This allows the ECU's capacitors to fully discharge. Some recommend waiting longer, even up to an hour, to be completely sure.

3. Reconnect the Battery: Reconnect the NEGATIVE (-) terminal first, then the POSITIVE (+) terminal.

4. Start the Car: Start your car and let it run for a few minutes. The ECU will begin re-learning your car's operating parameters. You may notice slightly different performance for the first few driving cycles as it re-adapts.

Important Considerations:

* Radio Code: Disconnecting the battery will likely erase your radio's preset codes. You may need your radio's code to restore functionality. Check your owner's manual.

* Other Electronic Systems: Other electronically controlled systems might require reprogramming or adjustments after a battery disconnect.

* Check Engine Light: After resetting the ECU, the check engine light might illuminate. This is normal as the ECU needs time to run diagnostics. If the light stays on, it indicates a persistent issue that needs to be addressed.

Alternative (Not Recommended): Some people suggest using a scan tool to clear codes. While this clears trouble codes, it doesn't necessarily achieve the same effect as disconnecting the battery in terms of resetting adaptive parameters. A simple battery disconnect is generally sufficient and safer.

This procedure works for most vehicles, including your 1995 Camaro. If you are uncomfortable performing this task, consult a qualified mechanic.