Code Definition

P0149 — Fuel timing error

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0149

P0149 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0149 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

This fault code indicates a problem with the timing of fuel delivery in the engine's combustion process. The code is set when the engine control module (ECM) detects that the timing of the fuel injection is not aligned properly with the engine's operational cycle. This misalignment can lead to inefficient combustion, reduced engine performance, and increased emissions. The issue could stem from a variety of sources including faulty fuel injectors, problems with the fuel pump, incorrect fuel pressure, or issues with the timing control mechanisms within the engine.

Quick Facts