This article will discuss common problems that trigger Lincoln's check engine light. You will also learn how to read check engine codes yourself on Lincoln Aviator, MKS, MKT, MKZ, Navigator, Town Car, or any other 1996 and newer models.
Fuel Pressure Sensor: The fuel pressure sensor can be a source of engine running issues accompanied by a check engine light on many V6 engines. Usual symptoms vary from hard starting or not starting to lack power and black smoke from the exhaust. Luckily, the sensor is not expensive, and it is quite easy to replace. Code: P0193 - fuel pressure sensor - circuit high
Fuel Pump Module: Truck-based SUVs, such as Lincoln, have a fuel pump driver module mounted on the chassis member. This module controls the speed of the fuel pump. As it is exposed to elements, it can eventually fail due to condensation and dirt contamination. This will cause the engine to stall and usually not be able to restart. Code: P1233 - Fuel pump driver module off-line
Vacuum Leaks: It is not rare to have a random cylinder misfire on a Lincoln. Tracing down the source of the problem can be tricky, as it usually happens sporadically. In addition to checking spark plugs and ignition coil, you should also inspect the intake for eventual vacuum leaks. Code: P0300
Evaporative Emission Control (EVAP) System: An EVAP system has many plastic hoses and lines that can get brittle and break over time. This causes various leaks, usually very small and hard to trace. Finding a leak is best by testing the whole system with a smoke machine. Codes: P0456 Check Engine - Small EVAP Leak
PCV Valve: Older Lincolns that have V8 Modular engines can suffer from an engine running extremely rough on idle and low speeds, or even stalling. If this is combined with code-combo P2195, P2197, P0171, and P0174 combo, it is almost certainly caused by a large vacuum leak. The first thing to check is PCV valves and hoses, as they tend to break, causing a sudden vacuum leak. Use either smoke generating machine or a carb cleaner to pinpoint the leak.
Throttle Actuator: Newer V6 Lincolns are seemingly prone to throttle-related issues. In most cases, this is caused by a throttle actuator stuck in one position, or it cannot open all the way. This will cause stalling, especially under hard acceleration. Replacing the throttle body assembly is the only solution. Code: P2112 - Throttle Actuator stuck
Fuel: Many 2005 or newer Lincolns can have a check engine light going on at the end of autumn when the temperatures drop. If there are no other apparent symptoms, this can easily be caused by an engine computer detecting a possible misfire when the engine is started. This usually happens because a summer-blend of fuel is still used. Code: P0316 - misfire detected on startup.
Troubleshooting Lincoln Check Engine Light This article will discuss common problems that trigger Lincoln's check engine light. You will also learn how to read check engine codes yourself on Lincoln Aviator, MKS, MKT, MKZ, Navigator, Town Car, or any other 1996 and newer models.