C3675 Engine Trouble Code
What is C3675?
C3675 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: | C3675 |
C3675 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
C3675 Code Structure
Understanding what each digit means in the C3675 chassis trouble code:
| C | 3 | 6 | 7 | 5 |
|---|---|---|---|---|
| Chassis Code | Ignition System Or Misfire | Fuel Temperature Sensor B Circuit Range/Performance | Cylinder 10 Contribution/Balance Fault | Crankshaft Position Sensor B Circuit Malfunction |
How to Fix C3675
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:
Disconnected, dirty, or fouled spark plugs commonly prevent proper engine operation. Replace spark plugs every season or 25 hours. Verify proper spark plug gap. If plugs are good, check ignition components: spark plug wires, coils, and ignition module.
Technical Notes:
Parts or components should not be replaced based solely on C3675 DTC. Consult your vehicle service manual for proper diagnostic procedures, possible causes, and required testing before replacement.
C3675 Description
C3675 engine trouble code is related to Crankshaft Position Sensor B Circuit Malfunction.
Main Cause
The primary reason for C3675 OBD-II Engine Trouble Code is: Fuel Temperature Sensor B Circuit Range/Performance.