Fault Code P0073 Chevrolet: Ambient Air Temperature Sensor Circuit High Voltage

When your Chevrolet's engine light comes on and the P0073 code is stored, it's indicating a high voltage issue in the ambient air temperature sensor circuit.

This can cause incorrect temperature readings, poor engine performance, and decreased fuel efficiency.

Common causes include faulty sensors, wiring problems, and electrical connection issues.

To diagnose, you'll need to inspect the sensor and its circuitry, check for damaged connectors, and test for voltage and resistance.

Depending on the issue, repairs may involve replacing the sensor, repairing wiring, or reprogramming the engine control module.

Learn more about the diagnosis and repair process to get your Chevrolet running smoothly again.

Key Takeaways

• The P0073 code indicates high voltage in the ambient air temperature sensor circuit, affecting engine performance and emissions.
• Faulty sensor readings can cause incorrect ambient air temperature displays on the dashboard and poor engine performance.
• Common causes include high voltage in the sensor circuit, a faulty Ambient Air Temperature Sensor, or poor electrical connections.
• Diagnosis involves inspecting the sensor and circuitry, checking for damaged or corroded connector pins, and testing for open or shorted wiring.
• Repairing the P0073 code may require replacing the ambient air temperature sensor, reprogramming the PCM, or ensuring proper installation of the sensor.

Symptoms of the P0073 Chevrolet Code in Chevrolet Vehicles

When your Chevrolet's engine light comes on, it's often accompanied by other symptoms that can help you identify the problem, and with the P0073 code, you may notice an incorrect ambient air temperature reading or faulty sensor readings, among other issues.

This code is related to the Ambient Air Temperature Sensor, which sends signals to the Engine Control Module (ECM).

The engine light is on, indicating a problem with the engine or emissions system

Incorrect ambient air temperature readings on your dashboard display

Faulty sensor readings, which can affect engine performance

Other related symptoms, such as poor engine performance or decreased fuel efficiency

Common Causes of the P0073 Chevrolet Code: A Diagnostic Overview

You've identified the P0073 code in your Chevrolet, and now it's time to explore the common causes behind this faulty ambient air temperature sensor code.

This code typically indicates a high voltage in the ambient air temperature sensor circuit.

A faulty Ambient Air Temperature Sensor can cause this issue.

An open or shorted Ambient Air Temperature Sensor harness can also be the culprit.

A poor electrical connection in the Ambient Air Temperature Sensor circuit is another possible cause.

A faulty Engine Control Module (ECM) could also trigger the P0073 code.

How to Diagnose the P0073 Chevrolet Code: Step-by-Step Procedure

To diagnose the P0073 Chevrolet code, start by reviewing the possible causes and visually examining the corresponding wiring harness and connectors. This will help you identify any signs of damage or corrosion that could be contributing to the issue.

Perform a thorough inspection of the Ambient Air Temperature Sensor and its circuitry. Check for:

Damaged or corroded connector pins

Open or shorted wiring harnesses

Poor electrical connections

Faulty Engine Control Module (ECM) operation

Effective Solutions: Repairing the P0073 Chevrolet Code

By pinpointing the root cause of the P0073 code, you can effectively repair the ambient air temperature sensor circuit and restore proper function to your Chevrolet's air conditioning and heating system.

Inspect the ambient air temperature sensor and its circuit for damage, corrosion, or poor connections, and replace any faulty components as needed.

Check for short circuits or wiring problems that may be causing the high voltage input.

Consider replacing the ambient air temperature sensor with a high-quality replacement sensor from a trusted manufacturer.

If necessary, have a professional mechanic reprogram or replace the power control module (PCM) if it's found to be the root cause of the P0073 trouble code.

Cost Analysis and Essencial Tools for Resolving the P0073 Chevrolet Code

After pinpointing the root cause of the P0073 code, you'll need to weigh the financial implications of the repair and invest in the right tools to get the job done efficiently.

The cost of diagnosing and repairing the P0073 code on a Chevrolet can range from $100 to $500, depending on the location, labor rates, and replacement parts needed.

To resolve the code, you'll need a scan tool, such as an OBD-II code reader, to retrieve trouble codes and live data.

A digital multimeter is also necessary to measure voltage and resistance in the ambient air temperature sensor circuit.

Additionally, a wiring diagram and repair manual specific to your Chevrolet model and year are required.

In some cases, a professional-grade scan tool, such as a Tech 2 or Snap-on Solus, may be needed for advanced diagnostic functions.

Preventive Measures to Avoid the P0073 Chevrolet Code in the Future

Regular maintenance of your Chevrolet's ambient air temperature sensor can go a long way in preventing the P0073 code from reappearing in the future.

You can avoid costly repairs and guarantee your vehicle runs smoothly by following some simple preventive measures.

Regularly inspect and clean the ambient air temperature sensor and its connections to prevent corrosion and guarantee accurate readings.

Verify proper installation of the ambient air temperature sensor to avoid incorrect voltage readings and faulty signals.

Check for any technical service bulletins (TSBs) related to the ambient air temperature sensor circuit to stay updated on potential issues and solutions.

Avoid exposing the ambient air temperature sensor to extreme temperatures, moisture, or physical damage to prevent malfunction.

Chevrolet Models Most Affected by the P0073 Chevrolet Code

Chevrolet models most prone to the P0073 code include certain Silverado and Impala models, as well as the Equinox, Cruze, and Malibu, which have been reported to experience this issue.

These models have shown a higher incidence of the P0073 code, which affects the Ambient Air Temperature Sensor circuit.

2007-2013 Chevrolet Silverado 1500, 2500, and 3500

2008 Chevrolet Impala

2010 Chevrolet Equinox

2011 Chevrolet Cruze

2012 Chevrolet Malibu

If you own one of these models, be aware of the potential for the P0073 code to occur, especially if you notice incorrect ambient air temperature readings or engine performance issues.

Related Fault Codes to P0073 Chevrolet Code

Frequently, when diagnosing the P0073 code, it's essential to ponder other related fault codes that may be triggered by similar issues in the ambient air temperature sensor circuit.

You'll want to check for other trouble codes, such as P0070, P0071, and P0072, which are all associated with issues in the ambient air temperature sensor circuit.

These codes may indicate a malfunction, range or performance problem, or an unspecified problem in the circuit.

• P0070: Ambient Air Temperature Sensor Circuit Malfunction
• P0071: Ambient Air Temperature Sensor Circuit Range/Performance Problem
• P0072: Ambient Air Temperature Sensor Circuit Problem

P0110, P0111, and P0097: Intake Air Temperature Sensor Circuit Codes (not directly related to ambient air temperature sensor circuit)

Frequently Asked Questions

How Do I Fix Code P0073?

Inspect the ambient air temperature sensor circuit wiring for damage or corrosion. Check for voltage fluctuations that could be causing the high voltage reading.

Ensure the sensor is properly calibrated. If you're unsure, consider consulting a professional.

A thorough wiring inspection will help identify the root cause of the issue and get your engine running smoothly again.

Can I Drive With a Bad Ambient Air Temperature Sensor?

A faulty ambient air temperature sensor can lead to incorrect temperature readings, affecting your engine's performance and potentially causing damage.

Driving with a bad sensor can cause poor fuel efficiency, decreased engine power, and even engine stalling.

It's vital to tackle the issue promptly to guarantee your safety on the road and prevent further damage to your vehicle.

What Happens When an Ambient Air Temperature Sensor Goes Bad?

A faulty ambient air temperature sensor causes inaccurate temperature readings on the dashboard display, leading to inefficient climate control. This can result in poor air conditioning or heating performance.

Additionally, a bad sensor can lead to weather resistance issues, affecting your vehicle's performance in extreme temperatures. In rare cases, it may even cause engine performance issues.

Replacing the sensor is crucial to avoid further problems.

How Do You Reset the Ambient Temperature Sensor on a Chevy Silverado?

Disconnect the negative battery cable.

Locate the ambient temperature sensor, usually behind the grille or on the front bumper, and clean it with a soft-bristled brush or cloth to remove dirt and debris. Inspect the wiring for damage or corrosion.

Reconnect the sensor and battery. Then, turn the ignition switch to the 'on' position.

Allow the system to relearn the sensor data through Silverado calibration.

Conclusion

You've completed the diagnostic journey for the P0073 code. Now, methodically diagnose the issue, inspect the sensor and connections, and potentially replace the Ambient Air Temperature Sensor or ECM if necessary.

By following this guide, you'll be able to fix the issue and get your Chevrolet running smoothly and efficiently.

Remember, don't let the P0073 code hold you back – take control and fix it today!