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Home >> Saturn >> 2001 >> SL2 Standard, MP2 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P1635: 5-Volt Reference Circuit >> Code Enable Criteria
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Code Enable Criteria

DTC sets when 5-volt reference signal is less than 4.66 volts or greater than 5.26 volts (except PCM service part numbers 21024985 and 21024986).

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