B0945 Engine Trouble Code
What is B0945?
B0945 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: | B0945 |
B0945 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
B0945 Code Structure
Understanding what each digit means in the B0945 body trouble code:
| B | 0 | 9 | 4 | 5 |
|---|---|---|---|---|
| Body Code | Intake Valve Control Solenoid Circuit Low | Injector Circuit Malfunction - Cylinders | Injection Pump Fuel Metering Control 'B' High | Crankshaft Position Sensor B Circuit Malfunction |
How to Fix B0945
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:
Crankshaft position sensor signals the computer for precise ignition and fuel injection timing. Faulty sensors cause rough running and reduced efficiency. Modern vehicles enter limp mode and illuminate the check-engine light.
Technical Notes:
Parts or components should not be replaced based solely on B0945 DTC. Consult your vehicle service manual for proper diagnostic procedures, possible causes, and required testing before replacement.
B0945 Description
B0945 engine trouble code is related to Crankshaft Position Sensor B Circuit Malfunction.
Main Cause
The primary reason for B0945 OBD-II Engine Trouble Code is: Injector Circuit Malfunction - Cylinders.