B0158 Engine Trouble Code
What is B0158?
B0158 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: | B0158 |
B0158 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
B0158 Code Structure
Understanding what each digit means in the B0158 body trouble code:
| B | 0 | 1 | 5 | 8 |
|---|---|---|---|---|
| Body Code | Intake Valve Control Solenoid Circuit Low | Fuel Rail/System Pressure — Too High | Cylinder 1 Injector Circuit Low | Clutch Position Sensor Circuit Malfunction |
How to Fix B0158
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:
Verify all electrical connections are clean and tight. Check for damaged wiring, especially in high-heat or high-vibration areas. Use manufacturer wiring diagrams for accurate diagnosis.
Technical Notes:
B0158 on electronically controlled automatic transmissions relates to shift solenoid operation. The solenoid actuates hydraulic circuits controlling clutches or bands for gear changes.
B0158 Description
B0158 engine trouble code is related to Clutch Position Sensor Circuit Malfunction.
Main Cause
The primary reason for B0158 OBD-II Engine Trouble Code is: Fuel Rail/System Pressure — Too High.