C144B Engine Trouble Code
What is C144B?
C144B 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: | C144B |
C144B 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
C144B Code Structure
Understanding what each digit means in the C144B chassis trouble code:
| C | 1 | 4 | 4 | b |
|---|---|---|---|---|
| Chassis Code | Fuel And Air Metering | O2 Sensor Heater Circuit Malfunction | Injection Pump Fuel Metering Control 'B' High | System Malfunction |
How to Fix C144B
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:
C144B 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.
C144B Description
C144B engine trouble code is related to System Malfunction.
Main Cause
The primary reason for C144B OBD-II Engine Trouble Code is: O2 Sensor Heater Circuit Malfunction.