EGR 'A' Control Stuck Open
The POWERSTROKE-P042E (Power Stroke) diesel fault code means: EGR 'A' Control Stuck Open. This is a serious severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- intermediate
- Estimated cost
- $300-$1,000
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Common Symptoms
- Rough idle
- Stalling at stop
- CEL
- Loss of power
Probable Causes (Ranked by Likelihood)
- Soot-stuck EGR valve Very Likely
- Failed EGR actuator Likely
- Excessive soot loading from short trips Likely
Step-by-Step Diagnostic Procedure
Remove and clean EGR valve.
Replace valve if actuator doesn't hold position.
Consider longer drive cycles or a highway run to clean up soot.
Frequently Asked Questions
What is P042E on a 6.7L Power Stroke (Scorpion)?
P042E on a 6.7L Power Stroke (Scorpion) (2011-present) indicates: EGR 'A' Control Stuck Open. This is a known diagnostic trouble code on this engine family and typically points to the causes listed above.
Can I drive with P042E on my Power Stroke?
Only drive short distances to get to a repair facility. Continued operation may cause further damage.
How much does it cost to fix P042E?
Repair cost is typically $300-$1,000 depending on the underlying cause and whether you DIY or use a shop. Diagnostic time alone runs $100-$180 at most independent diesel shops.
P042E on Other Platforms
The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown: