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 sensor in your car that checks how hot the exhaust is, isn't working right. It's like a thermometer for your car's exhaust, and it's not reading the temperature correctly.
The P14B4 code indicates that the signal from the exhaust gas temperature sensor is lower than expected, suggesting a potential issue with the sensor or its circuit.
The exhaust gas temperature sensor measures the temperature of the exhaust gases in the exhaust system. For Bank 2, front of the Diesel Particulate Filter (DPF), this sensor helps monitor and control the DPF's operation. A low circuit reading often indicates an open circuit, short to ground, or sensor failure.
• Check Engine Light illuminated
• Poor fuel efficiency
• Possible limp mode activation
• Faulty exhaust gas temperature sensor
• Wiring issues such as a short or open circuit
• Corroded or damaged connectors
Bank 2: The side of the engine opposite to Bank 1, usually the side without cylinder 1.
Diesel Particulate Filter (DPF): A filter designed to remove diesel particulate matter or soot from the exhaust gas of a diesel engine.
• Use an OBD-II scanner to verify the code.
• Inspect the exhaust gas temperature sensor and its wiring for damage.
• Test the sensor's resistance and compare it to specifications.
• Replace the faulty exhaust gas temperature sensor.
• Repair or replace damaged wiring or connectors.
• Clear the code and test drive to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Basic hand tools (screwdrivers, wrenches)
$100 - $300
Moderate
• Ford F-250
• Chevrolet Silverado
• Ram 2500
• Regular maintenance checks
• Ensure proper exhaust system operation
• Avoid short trips that don't allow the engine to fully warm up
Sensor Issue
• Address the issue promptly to avoid further damage.
• Consult a professional mechanic if unsure about repairs.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
This code has been commonly associated with diesel vehicles equipped with Diesel Particulate Filters since their introduction.
Moderate – It should be addressed soon to prevent potential damage to the exhaust system.
Ignoring emissions-related codes can lead to increased pollution and potential legal issues if the vehicle fails an emissions test.
• Engine at operating temperature
• Vehicle at idle or under load
The exhaust gas temperature sensor is located in the exhaust system, typically before the Diesel Particulate Filter on Bank 2.
Q: Can I drive with a P14B4 code?
A: It's possible to drive for a short period, but it's best to fix the issue soon to avoid potential damage.
Q: How do I reset the Check Engine Light after repair?
A: Use an OBD-II scanner to clear the code after confirming the repair is successful.
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