P0473
Exhaust Pressure Sensor High
Moderateexhaust
Overview
The P0473 code means the PCM has detected a exhaust pressure sensor high fault. This code relates to the exhaust system components that manage and monitor exhaust gas flow and pressure. An issue in the exhaust system can affect engine efficiency, emissions output, and overall vehicle performance.
Symptoms
- Poor fuel economy
- Failed emissions test
- Reduced engine performance
- Exhaust smell inside the cabin
Common Causes
- Faulty exhaust pressure sensor
- Damaged exhaust manifold or gasket
- Failed exhaust pressure control valve
- Carbon buildup in exhaust system
Diagnosis Steps
- 1Connect an OBD-II scanner and read all stored trouble codes and freeze frame data
- 2Visually inspect the exhaust system for leaks, cracks, or damage
- 3Test the exhaust pressure sensor with a multimeter
- 4Check the exhaust pressure control valve for proper operation
- 5Inspect wiring and connectors for the exhaust pressure circuit
Estimated Repair Cost
$150 — $1,200
Cost varies by vehicle, location, and repair shop. Includes parts and labor.
Commonly Affected Vehicles
Toyota TacomaHonda PilotJeep CherokeeFord Explorer
Related Codes
More Exhaust Codes
P0470Exhaust Pressure Sensor Malfunction
ModerateP0471Exhaust Pressure Sensor Range/Performance
ModerateP0472Exhaust Pressure Sensor Low
ModerateP0474Exhaust Pressure Sensor Intermittent
LowP0475Exhaust Pressure Control Valve Malfunction
ModerateP0476Exhaust Pressure Control Valve Range/Performance
ModerateFrequently Asked Questions
Minor exhaust codes may not affect immediate drivability, but exhaust leaks can allow harmful gases into the cabin. Have exhaust issues inspected promptly for safety reasons.