Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car has a sensor that checks the pressure in the exhaust system. This code means that the sensor is sending a signal that's too high, like if your thermometer said it was super hot when it wasn't.
The P0473 code is triggered when the Powertrain Control Module (PCM) detects a high voltage signal from the exhaust pressure sensor, indicating a possible fault in the sensor circuit.
The Exhaust Pressure Sensor A is responsible for monitoring the pressure in the exhaust system. It sends a voltage signal to the PCM that corresponds to the pressure level. If the voltage signal is higher than the expected range, the PCM will set the P0473 code.
• Check Engine Light illuminated
• Poor engine performance
• Increased emissions
• Faulty exhaust pressure sensor
• Wiring issues such as a short to voltage
• Faulty PCM (rare)
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Scan the vehicle for codes and freeze frame data.
• Inspect the exhaust pressure sensor and its wiring for damage.
• Test the exhaust pressure sensor's voltage output with a multimeter.
• Replace the exhaust pressure sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Ford F-Series
• Chevrolet Silverado
• Dodge Ram
• Regular maintenance of the exhaust system
• Periodic inspection of sensors and wiring
• Timely repair of exhaust leaks
Sensor Issue
• Do not ignore the Check Engine Light.
• Get the vehicle diagnosed by a professional.
• Avoid driving the vehicle hard until the issue is resolved.
Check with your vehicle manufacturer for specific warranty coverage on emissions-related components.
The P0473 code has been associated with exhaust system issues in vehicles with diesel engines, particularly in models with advanced emissions systems.
Moderate – While the car may still be drivable, it can lead to increased emissions and potential damage to the exhaust system.
Driving with a malfunctioning exhaust pressure sensor can lead to increased emissions, which may not comply with local environmental regulations.
• Engine running
• Exhaust system at operating temperature
The exhaust pressure sensor is typically located on or near the exhaust manifold or turbocharger.
Q: Can I drive my car with a P0473 code?
A: It's possible to drive, but it's not recommended as it can cause further damage and increase emissions.
Q: How do I reset the P0473 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is fixed, it should not return.
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