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Trouble Code Identification

TROUBLE CODE IDENTIFICATION

Code System Affected (1)MIL In Normal Mode (1)MIL In Test Mode Probable Cause
12  (Except Calif.) RPM Signal ON N/A Distributor, Starter Or Circuit, ECM
12  (Calif.) RPM Signal ON N/A Distributor, Starter Or Circuit, ECM
13  RPM Signal (1) (2) Distributor Or Circuit, ECM
14  Ignition Signal ON N/A Ignitor Or Circuit To ECM, ECM
16 (3) A/T Control Signal ON N/A ECM Or Circuit
21  Oxygen Sensor Signal ON ON Oxygen Sensor Or Circuit, ECM
22  Engine Coolant Temperature Sensor Signal ON ON Engine Coolant Temp. Sensor Or Circuit, ECM
24  Intake Air Temperature Sensor Signal ON ON Intake Air Temp. Sensor Or Circuit, ECM
25  Lean Air/Fuel Mixture ON ON Injector Or Circuit, Oxygen Sensor Or Circuit Fuel Pressure, Ignition System, Vacuum Leak, Compression Pressure, ECM
26  Rich Air/Fuel Mixture ON ON Injector Or Circuit, Oxygen Sensor Or Circuit Fuel Pressure, Ignition System, Compression Pressure, ECM
27  Sub-Oxygen Sensor Signal ON ON Sub-Oxygen Sensor Or Circuit, ECM
31  MAP Sensor Signal ON ON Map Sensor Or Circuit, ECM
41  Throttle Position Sensor Signal ON ON Throttle Position Sensor Or Circuit, ECM
42  Vehicle Speed Sensor Signal OFF OFF Vehicle Speed Sensor OrCircuit, ECM
43  Starter Signal N/A OFF Starter Signal Circuit,Starter Relay, IgnitionSwitch Or Circuit, ECM
51  Switch Condition Signal N/A OFF A/C Switch Circuit, Park/Neutral Switch Or Circuit, TPS Or Circuit, ECM
52  Knock Sensor Signal ON N/A Knock Sensor Or Circuit, ECM
71  EGR System Malfunction ON ON EGR System, EGR Temp. Sensor Or Circuit, EGR-VSV, ECM
(1) The MIL will be illuminated only if no "NE" signal is sent to ECM with engine at approximately 1000 RPM (Calif. models) or 1500 RPM (all others).
(2) The MIL will be illuminated only if no "G" signal is sent to ECM at least 4 times with engine speed between 500 and 4000 RPM. Also, on Calif. models, when in Test Mode, MIL will be illuminated if "NE" signal does not pulse 12 times to ECM during interval between "G1" and "G2" pulses.
(3) Applies only to models with electronic-controlled automatic transaxle.