This trouble code is a generic powertrain code that is applied to the OBD-II generated vehicles such as Dodge, Ram. If any error code is generated in your vehicle, you can detect it by the check engine light that gets illuminated by these errors. There are many factors due to which different error codes are generated in the vehicle. Take your vehicle to a professional and try to solve the reason for that error code.
Definition of P0149 error code
The technical definition is the fuel timing error. It can be elaborated as; this error is OBD-II generated error code is that PCM has detected some issues in the timing sequence of the fuel pump.
Meaning of the P0149 error code
In modern vehicles, a mechanical pump is needed that is driven directly off the crankshaft to clean-burning, direct injection. Mechanical pumps are used to time in sequence with the position of the crankshaft to generate a high-pressure injection pulse at a precise time interval.
The fuel pump is pulsed with a toothed sprocket which is connected with the sprocket on the front of the crankshaft. The timing of the two sprockets is mismatched then a code of P0149 is generated.
The PCM calculates the fuel timing advance by using the inputs of engine RPM and engine load. PCM controls the electronic fuel timing solenoid and that allows the direct injection timing to be advanced according to the speed of the engine and the generated loads.
PCM also controls the fuel pressure regulator and that is also responsible for controlling fuel pump pressure. The primary function of the fuel pressure sensor is to monitor the fuel pressure with a running engine that is helpful for PCM to get the actual readings and to continue the plot fuel pump timing. And if PCM detects some error in the fuel pump timing the P0149 error code is triggered and check engine light illuminates.
Possible causes of the error code P0149
Many factors can cause P0149 error code, some of them are:
- Defects in fuel timing solenoid
- Leakage in the fuel system
- Failed fuel pressure sensor
- Faults in fuel pressure control actuator
- Error in PCM programming
Symptoms of P0149 error code
- Malfunctioning indicator lamp illuminates
- No start condition of the vehicle
- Weird and strong fuel odor
- Vehicle enters in limp-in mode
- Poor and decreasing performance of vehicles engine
The severity of the P0149 error code
If your vehicle is diagnosed with a P0149 error code, it affects in the timing of the fuel sequence. Your vehicle may suffer from no start condition. This error code can affect many other components of the vehicle. So, if you find some issues in your vehicle, it is advisable to take your vehicle to the mechanic and get proper treatment of your vehicle.
Diagnosis and troubleshooting of the P0149 error code
For the diagnosis of the error code of your vehicle, it is a great idea to start checking from the initial point that is TBS of your vehicle. From this, you can know if this issue is known or not, if this issue is known, then that particular step should be taken to fix that issue that will save money as well as time.
Error code P0149 can be generated through some mechanical or electrical failure in your vehicle. To check the particular issues you will need a diagnostic scanner, an ohmmeter, and all the related information that will be helpful to diagnose that particular issue.
You need to check that if the pressure fuel pumps is recently retimed if there is an issue in that, the error code may be generated.
Retrieve all the stored error codes and freeze frame data that are collected by the scanner during the vehicle diagnosis. Reset all the errors and take a short test drive to check if the code returns.
If the code returns, check the fuel system components for the fuel leakage that emits a strong smell. If you detect the leakage in the fuel system components repair them and reset the code.
If the error code remains in your vehicle’s dashboard check the fuel pressure sensor, fuel control actuator, and fuel timing solenoid using the DVOM. If you find any faults in that system, repair or replace them.
If that error code still returns, then use your vehicle information source to search for TBS that matches your specific vehicle, symptoms, and codes. The information stored in the manual will help you to pinpoint the exact reason for the error code and will help you to rectify the problem.