1993 Acura Legend Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Trouble Code Identification

TROUBLE CODE IDENTIFICATION

Code (1) System Affected Probable Cause
0  ECM No Signal To ECM
1  HO2S Sensor HO2S Sensor Circuit Problem
2  HO2S Sensor HO2S Sensor Circuit Problem
3  MAP Sensor MAP Sensor Electrical Problem
4  Crank Angle Sensor No.1 Sensor Circuit Problem
5  MAP Sensor Map Sensor Mechanical Problem
6  Coolant Temperature Sensor Open/Shorted Signal Circuit
7 (2) Throttle Position Sensor Open/Shorted Signal Circuit
9  Cylinder Position Sensor No. 1 Problem In Cyl. Sensor Circuit
10  Intake Air Temperature (TA) Sensor Open/Shorted Signal Circuit
12  EGR System No EGR Action
13  Barometric Pressure (BARO) Sensor Open/Shorted Signal Circuit
14  Idle Air Control Valve (IACV) IACV Circuit Problem
15  Ignition Output Signal Open/Shorted Signal Circuit
16  Fuel Injector Open/Shorted Signal Circuit
17 (2) Vehicle Speed Sensor (VSS) No VSS Signal
18  Ignition Timing Adjuster Open/Shorted Signal Circuit
23  Left Knock Sensor Open/Shorted Signal Circuit
41  Left HO2S Heater Open/Shorted Signal Circuit
42  Right HO2S Heater Open/Shorted Signal Circuit
43  Left Fuel Supply System Open/Shorted HO2S Circuit
44  Right Fuel Supply System Open/Shorted HO2S Circuit
45  Left Fuel Metering Injector Control
46  Right Fuel Metering Injector Control
53  Right Knock Sensor Open/Shorted Signal Circuit
54  Crank Angle Sensor No. 2 Sensor Circuit Problem
59  Cylinder Position No. 2 Sensor Problem In Cylinder Sensor Circuit
(1)
If codes other than these are indicated, repeat self-diagnosis. If code(s) reappear, substitute a known good ECM, and recheck codes.
(2)
If S4 on automatic transaxle indicator panel also blinks, A/T control unit may require diagnosis.
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  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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