P0073 Mercedes-Benz Code - Ambient Air Temperature Sensor Circuit High Input
Quick Answer
This Diagnostic Trouble Code (DTC) is stored in the Engine Control Module (ECM) when a malfunction is detected with the Ambient Air Temperature Sensor. Common causes include Faulty Ambient Air Temperature Sensor, Ambient Air Temperature Sensor harness is open or shorted, Ambient Air Temperature Sensor circuit poor electrical connection. 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
- P0073 Mercedes-Benz indicates Ambient Air Temperature Sensor Circuit High Input.
- Common causes
- Common causes include Faulty Ambient Air Temperature Sensor, Ambient Air Temperature Sensor harness is open or shorted, Ambient Air Temperature Sensor circuit poor electrical connection.
- 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.
Code P0073 Mercedes-Benz Description
What are the Possible Causes of the DTC P0073 Mercedes-Benz?
- Faulty Ambient Air Temperature Sensor
- Ambient Air Temperature Sensor harness is open or shorted
- Ambient Air Temperature Sensor circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0073 Mercedes-Benz?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0073 Mercedes-Benz code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P0073 Mercedes-Benz code?
Need more information on how to fix the P0073 Mercedes-Benz code? Get Access to Factory Service Manuals
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Frequently Asked Questions about P0073 Mercedes-Benz Code
1. What are the common symptoms of OBDII code P0073 in a Mercedes-Benz related to the Ambient Air Temperature Sensor Circuit High Input?
- Common symptoms include inaccurate temperature readings on the dashboard, issues with the climate control system, and potential impact on engine performance.
2. What are the possible causes of OBDII code P0073 in a Mercedes-Benz?
- The code P0073 can be triggered by a faulty ambient air temperature sensor, damaged wiring or connectors, or issues with the sensor's circuitry.
3. How can I diagnose the Ambient Air Temperature Sensor Circuit High Input issue in my Mercedes-Benz?
- Diagnosing the problem involves checking the sensor's wiring and connectors for damage, testing the sensor's resistance, and verifying the sensor's readings against actual ambient temperature.
4. Can I drive my Mercedes-Benz with OBDII code P0073 active?
- While it may be possible to drive with the code active, it is recommended to address the issue promptly to prevent potential issues with the climate control system and engine performance.
5. How can I repair OBDII code P0073 in my Mercedes-Benz caused by the Ambient Air Temperature Sensor Circuit High Input?
- Repair options include replacing the ambient air temperature sensor, repairing or replacing damaged wiring, and ensuring proper connection of the sensor.
6. Will resetting the OBDII code P0073 in my Mercedes-Benz make the issue go away?
- Resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to reappear.
7. Can a DIY enthusiast fix OBDII code P0073 in a Mercedes-Benz, or should it be done by a professional?
- While some may attempt DIY repairs, due to the complexity of diagnosing and fixing electrical issues, it is recommended to have a professional technician address OBDII code P0073.
8. Are there any preventive measures to avoid triggering OBDII code P0073 in my Mercedes-Benz?
- Regular maintenance checks, including inspection of the ambient air temperature sensor and its components, can help prevent issues that lead to code P0073.
9. How long does it typically take to repair OBDII code P0073 in a Mercedes-Benz at a repair shop?
- The repair time can vary depending on the exact cause of the issue, but it usually takes a few hours to diagnose and fix the Ambient Air Temperature Sensor Circuit High Input problem.
10. Is OBDII code P0073 a common issue in Mercedes-Benz vehicles, or is it rare?
- While not as common as some other codes, OBDII code P0073 related to the Ambient Air Temperature Sensor Circuit High Input can occur in Mercedes-Benz vehicles, especially in older models or those with higher mileage.
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