Trouble Code Charts: Notes

Code No.	System Affected	Probable Cause
No Code	System Normal	System Normal
12 (1)	Ignition Reference Signal	Distributor or Circuit, ECM
13 (2)	Oxygen Sensor Circuit	O2 Sensor or Sensor Circuit, ECM
14	Shorted Coolant Temp. Sensor Signal	Temp. Sensor or Sensor Circuit, ECM
15 (3)	Open Coolant Temp. Sensor Signal	Temp. Sensor or Sensor Circuit, ECM
21	TPS/Idle Switch Signal	TPS Adjustment, TPS, ECM
22	Fuel-Cut Solenoid or Relay Circuit	Solenoid or Relay Circuit, ECM
23	Duty (Mixture Control) Solenoid Circuit.	Solenoid Circuit, ECM.
25	Air Induction System VSV Circuit.	VSV or Valve Circuit, ECM.
42	Fuel-Cut Relay To ECM Voltage High.	Relay or Relay Circuit, ECM
44 (2)	Oxygen Sensor Lean Fuel Mixture.	Duty (Mixture Control) Solenoid, Oxygen Sensor, ECM.
45 (2)	Oxygen Sensor Rich Fuel Mixture	Duty (Mixture Control) Solenoid, Oxygen Sensor, ECM
51	Faulty PROM	PROM
53	Defective Air Induction System VSV	Valve or ECM
54	Duty (Mixture Control) Solenoid Circuit	Solenoid or Solenoid Circuit, ECM
55	Defective Oxygen Sensor or ECM	Sensor or ECM
(1) Code will appear while fault exists before engine is started and will not be stored in memory. (2) Requires engine operation at part throttle for up to 5 minutes after engine reaches normal operating temperature to set trouble code. (3) Engine must operate at least 5 minutes before trouble code will be displayed.