P20AD Code - Reductant Metering Unit Temperature Sensor Circuit Range/Performance
Quick Answer
The P20AD code refers to a fault in the Reductant Metering Unit Temperature Sensor Circuit, which is a crucial component of the vehicle's emissions control system. Common causes include Faulty Temperature Sensor: The most common cause of this code is a malfunctioning reductant metering unit temperature sensor, Wiring Issues: Damage to the wiring or connectors associated with the temperature sensor can also trigger this fault code, Software Glitch: Sometimes, the issue may be caused by a software glitch in the vehicle's engine control module. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P20AD indicates Reductant Metering Unit Temperature Sensor Circuit Range/Performance.
- Common causes
- Common causes include Faulty Temperature Sensor: The most common cause of this code is a malfunctioning reductant metering unit temperature sensor, Wiring Issues: Damage to the wiring or connectors associated with the temperature sensor can also trigger this fault code, Software Glitch: Sometimes, the issue may be caused by a software glitch in the vehicle's engine control module.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P20AD Description
The P20AD code refers to a fault in the Reductant Metering Unit Temperature Sensor Circuit, which is a crucial component of the vehicle's emissions control system. This sensor is responsible for monitoring the temperature of the reductant metering unit, which is used to inject urea into the exhaust stream to reduce harmful emissions. When this sensor detects that the temperature is outside the expected range or that there is a performance issue, it triggers the P20AD fault code.
Common Causes of P20AD
- Faulty Temperature Sensor: The most common cause of this code is a malfunctioning reductant metering unit temperature sensor.
- Wiring Issues: Damage to the wiring or connectors associated with the temperature sensor can also trigger this fault code.
- Software Glitch: Sometimes, the issue may be caused by a software glitch in the vehicle's engine control module.
- Faulty Reductant Metering Unit: In some cases, the issue may be related to a problem with the reductant metering unit itself.
Symptoms of P20AD
- Check Engine Light: The most common symptom associated with this code is the illumination of the Check Engine Light on the dashboard.
- Reduced Fuel Efficiency: The vehicle may experience a decrease in fuel efficiency due to the engine not operating at its peak performance.
- Poor Performance: The vehicle may feel sluggish or have difficulty accelerating smoothly.
- Failed Emissions Test: If the issue is not resolved, the vehicle may fail emissions tests due to increased emissions output.
How to Fix P20AD
- Diagnose the Issue: The first step in resolving this issue is to use a diagnostic scanner to read the fault codes and determine the exact cause of the problem.
- Inspect Wiring and Connectors: Check the wiring and connectors associated with the temperature sensor for any damage or corrosion, and repair or replace as necessary.
- Replace Temperature Sensor: If the temperature sensor is found to be faulty, it will need to be replaced with a new one.
- Check Reductant Metering Unit: Inspect the reductant metering unit to ensure it is functioning properly and replace it if necessary.
- Clear Codes and Test: After completing the repairs, clear the fault codes from the vehicle's computer and test to ensure that the issue has been resolved.
Cost to Fix P20AD
The cost of repairing a P20AD fault code can vary depending on the specific cause of the issue. On average, the cost of replacing a temperature sensor can range from $100 to $200, including parts and labor. However, if additional components need to be replaced or if there are wiring issues that require repair, the cost may be higher. It's recommended to consult with a professional mechanic to get an accurate estimate based on the specific circumstances of the vehicle.
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