C0673 Engine Trouble Code
What is C0673?
C0673 indicates potential catalytic converter failure. If completely failed, your vehicle may not run properly and fuel economy will suffer significantly. Average replacement cost is $2,000–$2,140. This repair requires professional service and should not be delayed.
Code Information
| Code Type: | OBD-II Chassis (C) Trouble Code |
| System: | Chassis |
| Code: | C0673 |
C0673 Symptoms
Check Engine Light
Illuminated dashboard warning
Engine Stalling
Engine stops unexpectedly or misfires
Performance Issues
Reduced power or acceleration
Starting Problems
Difficulty starting the engine
C0673 Code Structure
Understanding what each digit means in the C0673 chassis trouble code:
| C | 0 | 6 | 7 | 3 |
|---|---|---|---|---|
| Chassis Code | Intake Valve Control Solenoid Circuit Low | Fuel Temperature Sensor B Circuit Range/Performance | Cylinder 10 Contribution/Balance Fault | Exhaust Gas Recirculation Sensor B Circuit High |
How to Fix C0673
Diagnostic Steps:
The catalytic converter has oxygen sensors before and after it. When warm and in closed-loop mode, the upstream O2 sensor reading should fluctuate, while downstream should remain steady.
Repair Solution:
Brake switch circuit concerns may involve open or shorted BPP circuits, damaged switches, or misadjustment. Verify stoplight function and follow proper self-test procedures per service manual.
Technical Notes:
C0673 DTC indicating a sensor fault does not always mean the sensor itself is bad. The issue may stem from the systems being monitored or even the sensor wiring. Proper diagnosis is essential.
C0673 Description
C0673 engine trouble code is related to Exhaust Gas Recirculation Sensor B Circuit High.
Main Cause
The primary reason for C0673 OBD-II Engine Trouble Code is: Fuel Temperature Sensor B Circuit Range/Performance.