P042E — EGR A Control Stuck Open

What Does P042E Mean?

P042E is a diagnostic trouble code indicating: EGR A Control Stuck Open. This code relates to the emission controls system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P042E

⚠️ Check Engine Light (MIL) illuminated
⚠️ EGR A Control Stuck Open not functioning as expected
⚠️ Related system may be in fail-safe mode
⚠️ Failed emissions test

Common Causes

🔍 Faulty EGR A Control Stuck Open
🔍 Wiring or connector issue in EGR A Control Stuck Open circuit
🔍 Related mechanical or electrical fault
🔍 ECM/PCM issue (rare)

Frequently Asked Questions

What does P042E mean?

P042E indicates: EGR A Control Stuck Open. The vehicle's computer has detected that the EGR A Control Stuck Open is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P042E?

Yes, P042E is generally safe to drive with in the short term. However, it should still be addressed to pass emissions testing and prevent potential secondary issues.

How much does it cost to fix P042E?

Repair costs for P042E typically range from $80 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect EGR A Control Stuck Open and related wiring
🔧 Replace faulty EGR A Control Stuck Open

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P042E: EGR A Control Stuck Open