Mass Air Flow Sensor

stormsam said:

the problem sill exists. Has anyone got any idea why this is happening?

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Wimblowdriver said:

Possibly and most likely because the sensors are ok and are doing their job. The MAF registers how much air is entering ahead of the turbo, the MAPT sensor registers how much air is entering the engine (after the intercooler). If the engine management system thinks the two values don't match it will throw a fault code up and may put the engine into limp mode. This could be due to a number of reasons, including splits in the air hoses, splits in the intercooler (the plastic end boxes split where they join the metal core), or a turbo fault. What is the fault code reference number you are getting?

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Wimblowdriver said:

Possibly and most likely because the sensors are ok and are doing their job. The MAF registers how much air is entering ahead of the turbo, the MAPT sensor registers how much air is entering the engine (after the intercooler). If the engine management system thinks the two values don't match it will throw a fault code up and may put the engine into limp mode. This could be due to a number of reasons, including splits in the air hoses, splits in the intercooler (the plastic end boxes split where they join the metal core), or a turbo fault. What is the fault code reference number you are getting?

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Wimblowdriver said:

Have you cleared the fault code? The engine management light can continue to come on when a fault is rectified but the fault code is not cleared from the ECU. I guess you are using a generic code reader and assume the fault code would be the P110300 in the attached list, if using a land rover specific reader. One easy check to make is inspect the wires in the plug connecting to the MAF sensor, they can break. Then check the intercooler - remove the front grille (easy job) and the cowl over the engine cooling fan (another 5 minute job). If you have air con, the intercooler sits between the air con and engine cooling rads. The plastic end boxes on the intercooler are a weak point - look for failure where the alloy of the core bends over to clamp the end boxes. A burst should be obvious. Next check all the hoses between the air filter, turbo, intercooler, and engine air intake for splits. If they look ok on the outside, take them off and check for delamination internally. Where in lincs are you?

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