B0168 Engine Trouble Code
What is B0168?
B0168 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 Body (B) Trouble Code |
| System: | Body |
| Code: | B0168 |
B0168 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
B0168 Code Structure
Understanding what each digit means in the B0168 body trouble code:
| B | 0 | 1 | 6 | 8 |
|---|---|---|---|---|
| Body Code | Intake Valve Control Solenoid Circuit Low | Fuel Rail/System Pressure — Too High | Cylinder 4 Contribution/Balance Fault | Clutch Position Sensor Circuit Malfunction |
How to Fix B0168
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:
VSS concerns may stem from noisy input signals caused by RFI/EMI from ignition wires, charging circuits, or aftermarket equipment. Verify VSS reads 0 mph when transmission is in Park.
Technical Notes:
B0168 DTC specifically relates to camshaft timing. When cam timing is over-retarded, the check-engine light illuminates and this code sets. Verify VCT solenoid operation and check for contamination.
B0168 Description
B0168 engine trouble code is related to Clutch Position Sensor Circuit Malfunction.
Main Cause
The primary reason for B0168 OBD-II Engine Trouble Code is: Fuel Rail/System Pressure — Too High.