Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with a sensor in your car that checks the air pressure used to spray a special liquid into the exhaust to clean it up. It's like when a spray bottle doesn't work because the nozzle is clogged.
The P2037 code is triggered when the engine control module (ECM) detects a problem with the circuit of the reductant injection air pressure sensor. This sensor monitors the air pressure used to inject reductant (like diesel exhaust fluid) into the exhaust system.
The reductant injection air pressure sensor is part of the vehicle's selective catalytic reduction (SCR) system, which reduces nitrogen oxide emissions. The sensor ensures the correct air pressure is maintained for the reductant injection process. A fault in this sensor's circuit can lead to improper reductant injection, affecting emissions control.
• Check Engine Light illuminated
• Reduced engine performance
• Increased emissions
• Faulty reductant injection air pressure sensor
• Damaged or corroded wiring/connectors
• Faulty ECM
Reductant: A fluid used in the SCR system to reduce emissions.
SCR: Selective Catalytic Reduction, a system to reduce nitrogen oxide emissions.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage.
• Test the reductant injection air pressure sensor.
• Replace the reductant injection air pressure sensor.
• Repair or replace damaged wiring/connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$150 - $400
Moderate
• Ford F-250
• Chevrolet Silverado 2500
• Dodge Ram 2500
• Regularly inspect and maintain the exhaust system.
• Ensure proper reductant fluid levels.
• Check wiring and connectors for corrosion.
Sensor Issue
• Address the issue promptly to avoid increased emissions.
• Consult a professional mechanic if unsure about repairs.
Check with the vehicle manufacturer for emissions-related warranty coverage.
This code has become more common with the increased use of SCR systems in diesel vehicles to meet emissions standards.
Moderate – It should be addressed soon to maintain emissions compliance and engine performance.
Ignoring this code can lead to increased emissions, which may not comply with environmental regulations.
• Engine running
• Vehicle at operating temperature
The reductant injection air pressure sensor is typically located near the SCR system in the exhaust line.
Q: Can I drive with a P2037 code?
A: It's possible to drive, but it's not recommended as it may lead to increased emissions and reduced engine performance.
Q: How does the reductant injection system work?
A: It sprays a special fluid into the exhaust to reduce harmful emissions, helping the vehicle meet environmental standards.
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