U0100 is a generic diagnostic trouble code, meaning it has the same definition for any vehicle made in the 1996 model year or newer (including the Mercury Mariner). This code tells you that communication has been lost between the ECM/PCM (main computer) and a particular control module has been completely lost. When a vehicle has … Read more
P2099 is a generic OBD II code. It has the same meaning for the Mercury Mariner as it would any other vehicle. It specifically indicates that your Mariner detected that air-fuel mixture reading as the exhaust gas exits the catalytic converter on the bank 2 side of the engine is too rich. (too much fuel … Read more
P2097 is a generic OBD II code, which means that it has the same meaning for the Mercury Mariner as it would any other vehicle. It specifically indicates that your Mariner detected that air-fuel mixture reading as the exhaust gas exits the catalytic converter is too rich. (too much fuel for the amount of fuel … Read more
P2098 is a generic OBD II code. It specifically indicates that your Mariner detected a lean condition after the catalytic converter (too much air for the amount of fuel present). P2098 Definition This particular code is generic, so it has the same meaning for your Mercury Mariner as any other vehicle. There are three parts … Read more
U0073 Definition: Control Module Communication Bus”A” Off U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Mercury Mariner as it would any other. This code appears when something has interrupted the communication between two of your Mariner’s control modules. The most common causes of U0073 are … Read more
P2276 is a general diagnostic trouble code. It means that your Mercury Mariner’s third (from the exhaust manifold) “bank 2” downstream oxygen sensor (behind the catalytic converter) is continuously sending voltage that indicates a lean air/fuel mixture. Having this code does not necessarily mean that the vehicle is running lean (although it can, but … Read more
P2274 in the Mercury Mariner is a general diagnostic trouble code. It means that the “bank 1” oxygen sensor (third oxygen sensor from the exhaust manifold, behind a catalytic converter) is continuously sending voltage that indicates a lean air/fuel mixture. This does not necessarily mean that the vehicle is running lean (although it can, … Read more
P2018 is a generic diagnostic trouble code (DTC) that indicates an issue with your Mercury Mariner’s intake manifold runner position sensor/valve (from here on out, we will be referring to this sensor by its common abbreviation of IMRC). P2018 Definition: IMRC – Switch Circuit Intermittent (Bank 1) IMRC The IMRC’s job is to help your Mariner’s … Read more
P0356 is a generic OBD II diagnostic code that indicates an issue with the ignition coil “F” (the sixth cylinder). Specifically with the primary or secondary wiring circuits. If your Mercury Mariner has thrown this code, it will usually be accompanied by P0306. Addressing P0356 should take care of P0306 on its own. P0356 is a … Read more
P0355 is a generic OBD II diagnostic code that indicates an issue with the ignition coil “E”. Specifically with the primary or secondary wiring circuits. If your Mercury Mariner has thrown this code, it may be accompanied by P0305. P0355 is a relatively straightforward diagnosis and is typically caused by a bad coil pack or wiring harness issue, although … Read more