When the check engine light on a 2015 Dodge Grand Caravan begins flashing, it’s not a subtle warning—it’s a red flag that something serious is happening inside the engine. Unlike a solid check engine light (which may indicate a less urgent issue), a flashing CEL almost always signals a severe engine misfire, a condition that can cause rapid internal damage if not addressed immediately.
In this case, the driver reported violent engine shaking during acceleration, especially when merging onto the interstate—a dangerous scenario for both the driver and the vehicle.
How We Diagnosed the Problem
We began with a full diagnostic inspection focused on the key symptoms: a flashing check engine light, loss of power, and rough acceleration. Our scan tools confirmed the presence of misfire codes, which pointed us toward a more serious mechanical issue.
After removing the valve cover, our technicians discovered significant wear on the camshaft lobes. These worn lobes were preventing the intake and exhaust valves from opening and closing properly, causing the severe misfire and engine instability.
We also found a failing valve cover gasket, which was contributing to a slow oil leak. While important, this was a secondary issue compared to the internal engine damage caused by the worn camshaft.
Why Internal Engine Damage Requires Immediate Attention
When core components like the camshaft lobes wear down, they disrupt the entire engine’s timing and performance. In a 2015 Dodge Grand Caravan, this can lead to:
- Severe misfiring and unstable engine operation
- Noticeable loss of power, especially under load
- Increased emissions and fuel consumption
- Risk of catalytic converter damage
- Potential for complete engine failure if the vehicle continues to be driven
These issues can’t be solved by simply replacing spark plugs or ignition coils. The damage is mechanical—and it only gets worse the longer it's ignored.
Our Long-Term Repair: Full Engine Replacement
Given the extent of the internal damage, we recommended a complete engine replacement using a new long block. This is the most reliable and cost-effective long-term solution in cases of severe internal wear.
Our repair process included:
- Removing the original engine and associated components
- Installing a new long block assembly with fresh internal components
- Replacing the valve cover gasket and other worn seals
- Reconnecting all electronic systems, sensors, and accessories
- Performing initial startup, relearn procedures, and thorough road testing
- Confirming no fault codes, smooth performance, and a return to safe operation
After installation and testing, the Caravan ran smoothly with no misfires, warning lights, or drivability concerns.
Why You Should Never Ignore a Flashing Check Engine Light
This repair is a textbook case of why flashing CELs should always be taken seriously. What started as a misfire could have escalated into a complete engine seizure and a costly tow.
Key takeaways:
- Engine misfires can damage the engine and catalytic converter in minutes
- Ignoring the problem multiplies repair costs
- Driving becomes unsafe, especially at highway speeds
- Professional diagnostics are essential for accurate repairs
Final Thoughts: Early Attention Saves Engines—and Budgets
If your 2015 Dodge Grand Caravan starts shaking under acceleration or you see a flashing check engine light, don’t wait. This warning is your vehicle’s way of saying “stop now, before it gets worse.”
What might have been a $300 ignition repair can easily become a $7,000 engine replacement if neglected. Early diagnostics, routine maintenance, and quick action make all the difference.
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