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 thinks the outside temperature is too high because of a problem with the sensor that measures the air temperature outside.
The P0073 code is triggered when the Powertrain Control Module (PCM) detects a high voltage signal from the ambient air temperature sensor circuit.
The ambient air temperature sensor is responsible for measuring the temperature of the air outside the vehicle. This information is used by the vehicle's computer to adjust various functions, such as climate control and engine performance. A 'Circuit A High' condition indicates that the sensor is sending a voltage signal that is higher than expected, which could be due to a malfunctioning sensor, wiring issues, or a problem with the PCM.
• Incorrect outside temperature reading
• Possible issues with climate control
• Check Engine Light illuminated
• Faulty ambient air temperature sensor
• Wiring issues such as open or short circuits
• Poor electrical connection
• Faulty PCM (rare)
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the P0073 code.
• Inspect the ambient air temperature sensor and its wiring for damage.
• Check for loose or corroded connections.
• Test the sensor's resistance and compare it to specifications.
• Replace the ambient air temperature sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Clear the code and test drive to see if it returns.
• OBD-II scanner
• Multimeter
• Basic hand tools
$50 - $150
Moderate
• Toyota Camry
• Ford F-150
• Honda Accord
• Regular inspection of sensors and wiring.
• Avoid exposure to extreme conditions that may damage sensors.
• Keep electrical connections clean and secure.
Sensor Issue
• If the Check Engine Light is on, have the vehicle inspected to prevent further issues.
• Ensure all vehicle maintenance is up to date.
Check with your vehicle manufacturer as sensors may be covered under emissions warranty.
This code has been common in vehicles with aging sensors or those exposed to harsh environmental conditions.
Low – This issue is not critical but should be addressed to ensure accurate temperature readings and optimal vehicle performance.
Driving with a Check Engine Light on may result in a failed emissions test.
• Vehicle parked in a stable temperature environment.
• Engine off and cooled down.
The ambient air temperature sensor is typically located near the front bumper or grille area of the vehicle.
Q: Can I drive with a P0073 code?
A: Yes, but it's best to get it checked to ensure accurate temperature readings.
Q: Will a P0073 code affect my car's performance?
A: It may affect climate control and fuel efficiency if not addressed.
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