Fuel Injection Technical Library » Two Digit Codes 75-99

Two Digit Codes 75-99

#	KOEO	CM	KOER	Code Definition
75			X	Brake On/Off switch failure always ON.
76			X	Insufficient VAT change during Dynamic Response Test (user error).
77			X	System failed to recognize brief WOT during Dynamic Response Test (user error).
79	X			A/C or defrost on during self test.
80			X	Cylinder #8 Failed Cylinder Balance Test.
81	X			Air management 2 circuit failure (AM2/TAD).
81		X		MAP sensor vacuum was not greater than 2 in-Hg (7 kPa) during normal vehicle operation.
82			X	Air management 1 circuit failure (AM1/TAB) .
83	X			EGR Control solenoid circuit failure.
	X			High speed electro-drive fan circuit failure.
	X	X		Low speed fuel pump relay circuit open.
84	X		X	EGR Vacuum Solenoid circuit failure.
85	X		X	Canister Purge Solenoid circuit failure.
86	X			3 - 4 Shift solenoid circuit failure.
86		X		Adaptive fuel limit reached.
87	X			Fuel pump primary circuit failure. When the FP relay was activated by the EEC, voltage was not detected on the control circuit.
87		X		Voltage was not detected on Fuel Pump Monitor while the engine was running.
88	X			Electro-drive fan circuit failure.
88		X		Loss of dual plug input control.
89		X		Converter clutch solenoid circuit failure.
90			X	All cylinders passed Cylinder Balance Test.
91	X			Shift solenoid 1 circuit failure (E4OD).
		X		No HEGO switching detected always lean (left side).
			X	HEGO sensor circuit indicates system lean (left side).
92	X			Shift solenoid 2 circuit failure (E4OD).
		X		No HEGO switching detected always rich (left side).
			X	HEGO sensor circuit indicates system rich (left side).
93	X			Coast clutch solenoid circuit failure (E4OD).
94	X			Converter clutch solenoid circuit failure (E4OD).
94			X	Thermactor Air Injection system inoperative (left side).
95	X	X		Fuel pump secondary circuit failure. The EEC senses infinite resistance to ground from the fuel pump on the Fuel Pump Monitor circuit.
96	X	X		Fuel pump secondary circuit failure. The EEC did not sense battery voltage on the Fuel Pump Monitor circuit.
97	X			Overdrive cancel indicator light circuit failure (E4OD).
98	X	X		Electronic pressure control driver open in EEC (E4OD).
98			X	Hard fault present.
99	X	X		Electronic pressure control circuit failure (E4OD).
99			X	EEC system hasn't learned to control idle.

KOEO = Key On Engine Off, CM = Continues Memory, KOER = Key On Engine Running

Codes 10-32
Codes 33-58
Codes 59-74
Three Digit Codes