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 the system in your car that helps reduce pollution is pushing air too hard, like blowing up a balloon too much.
The reductant injection system uses air pressure to inject a fluid that reduces emissions. If the pressure is too high, it can cause problems.
The P20E7 code indicates that the pressure in the reductant injection system is higher than the manufacturer's specified range. This system is part of the Selective Catalytic Reduction (SCR) system, which reduces nitrogen oxide emissions in diesel engines by injecting a urea-based fluid into the exhaust stream.
• Check Engine Light is on
• Reduced engine performance
• Increased emissions
• Faulty pressure sensor
• Blocked air lines
• Malfunctioning air pump
Reductant: A fluid, often urea-based, used in SCR systems to reduce emissions.
SCR: Selective Catalytic Reduction, a system that reduces nitrogen oxide emissions.
• Use an OBD-II scanner to confirm the code.
• Inspect the air lines for blockages.
• Test the pressure sensor and air pump for proper operation.
• Replace the faulty pressure sensor.
• Clear any blockages in the air lines.
• Repair or replace the malfunctioning air pump.
• OBD-II scanner
• Pressure gauge
• Basic hand tools
$150 - $500
Moderate
• Ford F-250
• Chevrolet Silverado 2500
• Ram 2500
• Regular maintenance of the SCR system
• Use high-quality reductant fluid
• Inspect air lines periodically
Emission Control Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional.
• Avoid heavy loads until the issue is resolved.
Check with your vehicle manufacturer; emissions-related components may have extended warranties.
This code has become more common with the increase in SCR systems in diesel vehicles to meet stricter emission standards.
Moderate – This issue can lead to increased emissions and reduced performance, so it should be addressed promptly.
Driving with a malfunctioning emission system may violate local emissions laws.
• Engine running
• Vehicle at operating temperature
The reductant injection system is typically located near the exhaust system, often under the vehicle.
Q: Can I drive with a P20E7 code?
A: It's not recommended to drive for long with this code, as it can lead to increased emissions and potential engine damage.
Q: How do I reset the Check Engine Light after fixing the issue?
A: After repairs, use an OBD-II scanner to clear the code and reset the light.
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