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 car's computer is getting a reading from a sensor that is too high. This sensor checks how hot the exhaust gases are before they go through a special filter that cleans them.
The P14A5 code is triggered when the exhaust gas temperature sensor in front of the Diesel Particulate Filter (DPF) on Bank 1 sends a signal that is higher than expected.
The exhaust gas temperature sensor measures the temperature of the exhaust gases before they enter the Diesel Particulate Filter. If the sensor's output voltage is higher than the manufacturer's specified range, the engine control module (ECM) will set the P14A5 code.
• Check Engine Light illuminated
• Poor fuel economy
• Reduced engine performance
• Faulty exhaust gas temperature sensor
• Wiring issues such as shorts or open circuits
• Connector problems or corrosion
Diesel Particulate Filter (DPF): A device designed to remove diesel particulate matter or soot from the exhaust gas of a diesel engine.
Exhaust Gas Temperature Sensor: A sensor that measures the temperature of the exhaust gases to help control emissions.
• Use an OBD-II scanner to confirm the code.
• Inspect the exhaust gas temperature sensor and its wiring for damage.
• Test the sensor's resistance and compare it to the manufacturer's specifications.
• Replace the faulty exhaust gas temperature sensor.
• Repair any damaged wiring or connectors.
• Clear the code and test drive the vehicle to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $300
Moderate
• Volkswagen Jetta TDI
• Audi A3 TDI
• BMW 328d
• Regularly inspect and maintain exhaust system components.
• Use high-quality fuel to prevent soot buildup.
• Follow the manufacturer's maintenance schedule.
Sensor Issue
• Have the issue diagnosed and repaired promptly to avoid further damage.
• Consider using a fuel additive to help keep the exhaust system clean.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
Exhaust gas temperature sensor issues have been common in diesel engines due to the complexity of emissions control systems.
Moderate – While the vehicle may still be drivable, it can lead to increased emissions and potential damage to the DPF.
Ignoring this code may lead to failing emissions tests and increased pollution.
• Engine at operating temperature
• Vehicle in a safe and stationary position
The exhaust gas temperature sensor is located in the exhaust system, in front of the Diesel Particulate Filter on Bank 1.
Q: Can I drive with a P14A5 code?
A: It's possible to drive with this code, but it's not recommended as it can lead to further damage and increased emissions.
Q: How do I reset the P14A5 code?
A: After repairing the issue, you can use an OBD-II scanner to clear the code.
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