Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that a part in your car that helps reduce pollution isn't working right. It's like when a faucet doesn't let out the right amount of water.
The reductant metering unit is responsible for injecting the correct amount of diesel exhaust fluid (DEF) into the exhaust system to reduce emissions. Code P2EAD indicates a performance issue with the second metering unit.
The P2EAD code is triggered when the Engine Control Module (ECM) detects that the performance of the second reductant metering unit is not within the expected range. This unit is crucial for the proper dosing of DEF into the exhaust to neutralize harmful NOx emissions.
• Check Engine Light is on
• Increased emissions
• Possible reduction in engine performance
• Faulty reductant metering unit
• Clogged DEF injector
• Wiring or connector issues
DEF: Diesel Exhaust Fluid, a fluid used to reduce emissions in diesel engines.
ECM: Engine Control Module, the computer that manages engine functions.
• Perform a visual inspection of the reductant metering unit and related wiring.
• Use a scan tool to check for additional codes and freeze frame data.
• Test the operation of the reductant metering unit and DEF injector.
• Replace the faulty reductant metering unit.
• Clean or replace the DEF injector if clogged.
• Repair or replace damaged wiring or connectors.
• OBD-II scan tool
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Ford F-250
• Chevrolet Silverado
• Ram 2500
• Regularly check and maintain the DEF system.
• Use high-quality DEF fluid.
• Inspect wiring and connectors periodically.
Emission Control System
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional.
• Ensure the DEF tank is filled with the correct fluid.
Check with the vehicle manufacturer for warranty coverage on emission-related components.
This code has become more common as stricter emission regulations have been implemented, requiring more complex DEF systems.
Moderate – Addressing this issue promptly can prevent further emissions-related problems.
Operating a vehicle with this code may lead to increased emissions, which can be illegal in some areas.
• Engine running at normal operating temperature
• Vehicle in closed-loop operation
The reductant metering unit is typically located near the DEF tank or along the exhaust system.
Q: Can I drive with a P2EAD code?
A: While the vehicle may still be drivable, it's important to address the issue to avoid increased emissions and potential engine performance problems.
Q: What happens if I ignore this code?
A: Ignoring this code can lead to increased emissions, possible fines, and further damage to the emission control system.
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