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MAss air flow sensor, or the AMM meter
If getting no signal, the amm is most likely bad, but first, take the conector off ( always plug or unplug amm with key turned off ) and hit it with some electronic contact cleaner and plug and unplug it a few times to clean off oxidation, then plug it back in and clear the codes , then start it up and see if the code comes back, if it does, the amm is probably shot.
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-------Robert, '93 940t, '90 240 wagon, '84 240 diesel (she's sick) , '80 245 diesel, '86 740 GLE turbo diesel, '92 Ford F350 diesel dually
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