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Code 121 AMM 200

On a 92 240 wagon (200,000 miles) with code 121 was a dirty connection at the Air Mass Meter (so far). Cleaned connection and cleared the code and the light did not come back on for a couple of days of driving. Its seems like it would be a good idea to clean this connection with a small wire brush and apply die electric grease to it before plugging it back in. OBD 1 is the only way to go.






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