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Home >> Oldsmobile >> 1986 >> Toronado >> Repair and Diagnosis >> Engine Performance >> System >> BCM System, Part II >> ECM Trouble Code Charts - Trouble Shooting >> Code B334, Loss Of ECM Serial Data (Riviera) >> Note On INTERMITTENTS:

Note On INTERMITTENTS:

If only Code B334 shows up as "History", check for momentary loss of ECM's ignition (circuit 439), battery (circuit 480), or grounds (circuits 450A, 450X and 551). See CHART A1, NO "SERVICE ENGINE SOON" LIGHT.

If Code B334 is set as "History", along with any of the following codes set as "History"; B335, B336, B337, B552, B553 and/or EO47, see MULTIPLE INTERMITTENT CODES chart.

If Code B334 is set as "History", along with Code EO51, follow the Code EO51 chart.

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