What is CID 42:
CID 42 refers to an issue with the exhaust gas recirculation (EGR) valve. The ECM detects a malfunction in the EGR system, which can result in poor fuel economy, engine knocking, or increased emissions due to improper exhaust gas circulation.
Why This Happens:
- Faulty or stuck EGR valve.
- Clogged or contaminated exhaust system components.
- Shorted or damaged wiring in the EGR control circuit.
- Loose or corroded connectors.
- ECM failure to properly process EGR valve data.
How to Fix It:
- Inspect the EGR valve for malfunctions or carbon buildup.
- Test the EGR valve operation to ensure it opens and closes correctly.
- Clean or replace clogged exhaust components.
- Check wiring and connectors for damage or corrosion.
- Replace the faulty EGR valve or components as needed.
How to Avoid It Before It Happens:
- Regularly clean or replace the EGR valve to prevent carbon buildup.
- Inspect exhaust components and the EGR system for contaminatin.
- Keep connectors clean and corrosion-free.
- Perform diagnostic checks to monitor EGR valve performance.
- Clue’s equipment maintenance services monitor exhaust systems and help prevent issues before they affect engine operation.
