Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This means there's a big leak in the system that helps clean the car's exhaust. Imagine a balloon with a hole; it can't hold air, just like this system can't work right with a leak.
The code indicates that the vehicle's onboard diagnostics detected a large leak in the reductant system, which is responsible for reducing emissions.
The reductant system, often involving Diesel Exhaust Fluid (DEF), is used in vehicles to reduce nitrogen oxide emissions. A large leak in this system can prevent it from functioning properly, leading to increased emissions and potential regulatory non-compliance.
• Check engine light is on
• Increased exhaust emissions
• Possible reduction in engine performance
• Damaged reductant tank
• Faulty reductant injector
• Loose or damaged hoses or connections
Reductant: A substance used to reduce emissions in the exhaust system.
DEF: Diesel Exhaust Fluid, a key component in reducing emissions in diesel engines.
• Inspect the reductant tank for visible leaks or damage.
• Check all hoses and connections for signs of wear or disconnection.
• Use a diagnostic tool to confirm the presence of the P2D1E code and any related codes.
• Replace or repair the reductant tank if damaged.
• Fix or replace any faulty hoses or connections.
• Replace the reductant injector if it is found to be faulty.
• OBD-II scanner
• Wrench set
• Leak detection kit
$200 - $600
Moderate
• Ford F-250
• Chevrolet Silverado
• Ram 2500
• Regularly inspect the reductant system for leaks.
• Ensure proper maintenance of the exhaust system.
• Use high-quality Diesel Exhaust Fluid (DEF).
Emissions Control Issue
• Do not ignore the check engine light.
• Have the vehicle inspected by a professional if unsure.
• Avoid driving extensively until the issue is resolved.
Check with the vehicle manufacturer, as emissions components may be covered under warranty.
This code has become more common with the increased use of SCR (Selective Catalytic Reduction) systems in diesel vehicles.
Moderate – While the vehicle may still be drivable, emissions will be higher, and it should be addressed soon to avoid further issues.
Driving with a malfunctioning emissions system can lead to fines and contribute to environmental pollution.
• Engine at operating temperature
• Vehicle in a stationary position
The reductant system components are usually located near the exhaust system, including the DEF tank and injector.
Q: Can I drive my car with a P2D1E code?
A: It's possible, but not recommended as it can increase emissions and may lead to further damage.
Q: How do I know if my reductant system has a leak?
A: A diagnostic scan showing a P2D1E code and a check engine light are common indicators.
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