B0949 Engine Trouble Code
What is B0949?
The B0949 check-engine light can indicate issues ranging from minor (loose gas cap) to serious (catalytic converter failure). Professional diagnostic scanning at a dealer or shop will identify the exact cause and required repairs.
Code Information
| Code Type: | OBD-II Body (B) Trouble Code |
| System: | Body |
| Code: | B0949 |
B0949 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
B0949 Code Structure
Understanding what each digit means in the B0949 body trouble code:
| B | 0 | 9 | 4 | 9 |
|---|---|---|---|---|
| Body Code | Intake Valve Control Solenoid Circuit Low | Injector Circuit Malfunction - Cylinders | Injection Pump Fuel Metering Control 'B' High | Reverse Input Circuit |
How to Fix B0949
Diagnostic Steps:
Check if fuel pump primes when key is turned to ON. Measure fuel pressure and verify bright white-blue spark at all plugs. Also verify mechanical timing alignment.
Repair Solution:
A/C pressure sensor monitors refrigerant pressure changes. DTC sets when pressure change falls outside calibration. Verify A/C system function, refrigerant charge, and electrical connections.
Technical Notes:
For B0949, verify VCT solenoid operation. Look for stuck or sticking valves caused by contamination. Consult vehicle-specific repair manual for proper component testing procedures.
B0949 Description
B0949 engine trouble code is related to Reverse Input Circuit.
Main Cause
The primary reason for B0949 OBD-II Engine Trouble Code is: Injector Circuit Malfunction - Cylinders.