OBD-II Code P0473 is a diagnostic trouble code that indicates an issue with the exhaust pressure sensor circuit. This code is triggered when the Engine Control Module (PCM) detects a high signal from the exhaust pressure sensor, which is responsible for informing the PCM about the pressure levels in the exhaust manifold.
What Does the P0473 Code Mean?
The P0473 code specifically means that there is a problem with the exhaust pressure sensor “A” circuit, indicating that the signal from the sensor is higher than expected. This can lead to incorrect readings and affect the vehicle’s performance.
What Causes the P0473 Code?
Several factors can trigger the P0473 code, including:
- Exhaust pressure sensor failure
- Powertrain Control Module (PCM) failure
- Wiring issues, such as damaged or corroded wires
What Are the Symptoms of the P0473 Code?
Common symptoms associated with the P0473 code may include:
- Check Engine Light illuminated
- Poor engine performance
- Increased emissions
- Difficulty in passing emissions tests
How Serious Is the P0473 Code?
The P0473 code is considered to have moderate severity. While it may not pose an immediate threat to vehicle safety or functionality, it is advisable to have it diagnosed and repaired promptly to prevent more serious issues from arising.
How to Diagnose the P0473 Code
To properly diagnose the P0473 code, a mechanic will typically:
- Use an OBD-II scanner to confirm the code and check for any additional codes
- Inspect the exhaust pressure sensor and its wiring for damage or corrosion
- Test the exhaust pressure sensor’s functionality
- Check the PCM for proper operation
Common Repairs for the P0473 Code
Repairs for the P0473 code may include:
- Replacing the exhaust pressure sensor
- Repairing or replacing damaged wiring or connectors
- Replacing the Powertrain Control Module (if necessary)
How Much Does It Cost to Fix the P0473 Code?
The cost to fix the P0473 code can vary widely depending on the specific problem and the vehicle make and model. Generally, repairs can range from $100 to $500, with sensor replacement being on the lower end and PCM replacement on the higher end.
Can I Fix the P0473 Code Myself?
If you have experience with automotive repairs and the necessary tools, you may be able to diagnose and fix the P0473 code yourself, particularly if it involves replacing the exhaust pressure sensor or repairing wiring. However, if you are unsure or the problem is more complex, it is recommended to consult a professional mechanic.
