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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
DTC 12  (Except Calif.) RPM Signal ON N/A Distributor, Starter Or Circuit, ECM
DTC 12  (Calif.) RPM Signal ON N/A Distributor, Starter Or Circuit, ECM
DTC 13  RPM Signal (2) (3) Distributor Or Circuit, ECM
DTC 14  Ignition Signal ON N/A Ignitor Or Circuit To ECM, ECM
DTC 16 (4) ECT Control Signal ON N/A ECM Or Circuit
DTC 21  Oxygen Sensor Signal ON ON Oxygen Sensor Or Circuit, ECM
DTC 22  Engine Coolant Temperature Sensor Signal ON ON Engine Coolant Temp. Sensor Or Circuit, ECM
DTC 24  Intake Air Temperature ON ON Intake Air Temp. SensorOr Circuit, ECM
DTC 25  Lean Air/Fuel Mixture ON ON Injector Or Circuit, Oxygen Sensor Or Circuit Fuel Pressure, Ignition System, Vacuum Leak, Compression Pressure, ECM
DTC 26  Rich Air/Fuel Mixture ON ON Injector Or Circuit, Oxygen Sensor Or Circuit Fuel Pressure, Ignition System, Vacuum Leak, Compression Pressure, ECM
DTC 27  Sub-Oxygen Sensor Signal ON ON Sub-Oxygen Sensor Or Circuit, ECM
DTC 31  MAP Sensor Signal ON ON MAP Sensor Or Circuit, ECM
DTC 41  Throttle Position Sensor Signal ON ON Throttle Position Sensor Or Circuit, ECM
DTC 42  Vehicle Speed Sensor Signal ON OFF Vehicle Speed Sensor Or Circuit, ECM
DTC 43  Starter Signal N/A OFF Starter Signal Circuit,Starter Relay, IgnitionSwitch Or Circuit, ECM
DTC 51  Switch Condition Signal N/A OFF A/C Switch Circuit, Park/Neutral Switch Or Circuit, TPS Or Circuit, ECM
DTC 52  Knock Sensor Signal ON N/A Knock Sensor Or Circuit, ECM
DTC 71  EGR System Malfunction ON ON EGR System, EGR Temp. Sensor Or Circuit, EGR-VSV, ECM
(1) ON indicates MIL on instrument panel will be illuminated. N/A indicates item is not included in malfunction diagnosis when using this mode. OFF indicates MIL on instrument panel will not be illuminated even if malfunction is detected.
(2) 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).
(3) 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.
(4) Applies only to models with electronic-controlled automatic transaxle.