5.3 DDEC DESCRIPTIONS 5.3 DDEC DESCRIPTIONS To read codes, use the diagnostic data reader or depress and hold the diagnostic request switch with the ignition ON, engine at idle or not running.  Active codes will be flashed on the SEL. Inactive codes will be flashed on the CEL. The cycle will repeat until the operator releases the diagnostic request switch. Flash codes and descriptions are listed in Table 5-1. Flash  Codes DDEC  Description 11 VSG sensor input voltage low 12 VSG sensor input voltage high 13 Coolant level sensor input voltage low 14 Oil, coolant,  or intercooler,  temperature sensor input  voltage  high 15 Oil, coolant,  or intercooler,  temperature sensor input  voltage  low 16 Coolant level sensor input voltage high 17 Bypass or throttle, valve position sensor input voltage high 18 Bypass or throttle, valve position sensor input voltage low 21 TPS  input voltage  high 22 TPS  input voltage  low 23 Fuel temperature sensor input voltage high 24 Fuel temperature sensor input voltage low 25 No  active  codes 26 Auxiliary shutdown #1, or #2, input active 27 Air  inlet  or  intake  air,  temperature sensor input  voltage  high 28 Air inlet or intake air, temperature sensor input voltage low 31 Auxiliary high side output open circuit or short to ground 32 CEL or SEL short to battery (+) or open circuit 33 Turbo boost sensor input voltage high 34 Turbo boost sensor input voltage low 35 Oil pressure sensor input voltage high 36 Oil pressure sensor input voltage low 37 Fuel pressure sensor input voltage high 38 Fuel pressure sensor input voltage low 41 Too many SRS (missing TRS) 42 Too many SRS (missing SRS) 43 Coolant  level  low 44 Oil, coolant, intercooler or intake air, temperature high 45 Oil  pressure  low All information subject to change without notice. 5-6 6SE497  9709   Copyright © 1997 DETROIT DIESEL CORPORATION