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P2691 Severity
Identifying an OBD code is just the start of a complete diagnostic routine. Most trouble codes are caused by a sensor reporting a value that is out of range. Just replacing a sensor may not fix underlying issues. Be sure to understand the code, the part or system in your car that the code refers to, and the risks of delaying professional repair.
Proper diagnosis will save you time and money on unnecessary repairs.
Urgent codes indicate immediate action is necessary. These are urgent and significant malfunctions that can cause severe damage to the vehicle or harm the driver and passengers.
Fuel Injectors have calibration numbers printed on the side of them. Any time an injector is replaced, this number must be entered into the engine computer (PCM) and Glow Plug Control Module (GPCM). If the calibration ID is not registered to both modules, code P2691 will be stored.
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OBD-II Code Decreased engine performance is defined as a Cylinder 6 Injector Data Incompatible
Fuel Injectors have calibration numbers printed on the side of them. Any time an injector is replaced, this number must be entered into the engine computer (PCM) and Glow Plug Control Module (GPCM). If the calibration ID is not registered to both modules, code P2691 will be stored.