Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This means that a part of your car that helps reduce pollution is getting too hot.
The Selective Catalytic Reduction (SCR) system uses a catalyst to reduce nitrogen oxide (NOx) emissions. The inlet temperature sensor measures the temperature of the exhaust gases entering the SCR catalyst. If this temperature is too high, it can indicate a problem with the system.
The P214A code is triggered when the Engine Control Module (ECM) detects that the temperature at the inlet of the SCR NOx catalyst is higher than the expected range. This can be due to excessive exhaust temperatures or a malfunctioning temperature sensor.
• Check Engine Light is on
• Reduced engine performance
• Possible increase in exhaust emissions
• Malfunctioning temperature sensor
• Exhaust leak near the sensor
• Faulty SCR catalyst
SCR: Selective Catalytic Reduction
NOx: Nitrogen Oxides
ECM: Engine Control Module
• Scan for codes and freeze frame data
• Inspect the SCR temperature sensor and wiring
• Check for exhaust leaks near the sensor
• Replace the SCR temperature sensor
• Repair any exhaust leaks
• Replace the SCR catalyst if faulty
• OBD-II scanner
• Multimeter
• Wrench set
$200 - $800
Moderate
• Ford F-250
• Chevrolet Silverado
• Ram 2500
• Regularly inspect exhaust system
• Ensure proper engine tuning
• Use high-quality fuel
Sensor Issue
• Avoid driving the vehicle until repaired
• Consult a professional mechanic
Check with your vehicle manufacturer for emissions-related warranty coverage.
This code has become more common with the increased use of SCR systems in diesel engines to meet emissions standards.
Moderate – Addressing this issue promptly can prevent further damage to the emission system.
Operating a vehicle with a malfunctioning emission system may violate emissions regulations.
• Vehicle at operating temperature
• Under load conditions
The SCR NOx catalyst is located in the exhaust system, typically under the vehicle.
Q: Can I drive with a P214A code?
A: It's not recommended as it may lead to further damage or increased emissions.
Q: How do I reset the P214A code?
A: After repairs, use an OBD-II scanner to clear the code.
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Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
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Fitment Required · Vehicle-fitment part
Relevant when catalyst-efficiency or emissions faults persist after proper diagnosis.
Catalyst-efficiency faults sometimes point toward converter problems after proper testing.
Catalytic converters are highly vehicle-specific and should not be purchased by code alone.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.