B3549 Diagnostic Trouble Code

B3549 is a kind of OBD-II Diagnostic B-Body Diagnostic Trouble Code.

It is considered generic because it applies to all makes and models of vehicles, although specific repair steps may be different depending on your car model.

Symptoms

Symptoms of a B3549 diagnostic trouble code may include:

Vacuum leak on the engine
Reduction in engine performance, especially at low RPM levels
Engine surge
Rich or lean exhaust

Possible Causes :

The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Fuel with a large percentage of sulfur will clog the DPF quickly
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)

Repair Processes :

Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed. If the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for.

Process Tips

Diagnostic trouble code B3549 is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.

Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before B3549.

Fortunately, B3549 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B3549 Trouble Code For Specific Cars

B3549 Siata Amica Intake Air Temperature Sensor 2 Circuit Low
B3549 Bristol Beaufighter Crankshaft Position Sensor A Circuit Low Input
B3549 Iveco Vertis Seat Direction Switch Assembly Circuit Short To Battery
B3549 Vermorel Vermorel Purge Flow Sensor Circuit Low Input
B3549 Oldsmobile Bravada Cylinder 7 Injector Circuit High
B3549 Lotus Elise 111r Traction Control Disable Lamp - Circuit Short to Battery
B3549 Tvr 390 Power Door Lock Circuit Failure