Your Lotus 79 engine control system detects a problem, the computer stores the diagnostic trouble
code P2091 in its memory.
To figure out what is wrong with your vehicle you must first extract the P2091 DTC For Lotus 79.
Another consequence of P2091 Lotus 79 engine overheating may be a blown head gasket. Heat makes aluminum swell almost three times faster than cast iron. Thermal stress can distort the head and make it swell in areas that are hottest like those between exhaust valves in adjoining cylinders, and areas that have restricted coolant flow like the narrow area that separates the cylinders. The typical aluminum head swells most in the middle, which can crush the head gasket if the head gets too hot. This will usually cause the head gasket to leak compression between adjacent cylinders, or leak coolant into the cylinders.
P2091 Lotus 79 DTC Meaning
Powertrain Code - Problem is related engine, transmission and emissions systems.
MFG - Manufacturer Specific
TP Sensor Learn Not Complete
PCM Stack Overrun
The P2091 Lotus 79 Check Engine lamp is perhaps the most troubling of lights because it could mean so many different things, from you didn't screw the gas cap on tightly enough to look out for pistons flying through the hood and into the stratosphere. The easiest way to find out what this light is telling you is to hook your vehicle up to a scan tool. P2091 diagnostic tool looks a little like an oversized calculator and plugs into a communication port inside the car. After you instruct it to perform the scan, it speaks P2091 DTC For Lotus 79 with your car's computers to find out exactly what's prompting the light to turn on.