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Trouble Code Identification

TROUBLE CODE IDENTIFICATION (1)

Code Description
12  RPM Signal Circuit
13  RPM Signal Circuit
14  Ignition Signal Circuit
16  ECT Control Signal Malfunction
21
ES300 & SC300  Main Oxygen Sensor Circuit
GS300 (2) Main Oxygen Sensor Circuit
28
ES300 & SC300  Main Oxygen Sensor Circuit
GS300 (2) Main Oxygen Sensor Circuit
22  Coolant Temperature Sensor Signal Circuit
24  Intake Air Temperature Sensor Signal Circuit
25
ES300  Air/Fuel Ratio Malfunction
GS300 & SC300  Air/Fuel Ratio Malfunction
26
ES300  Air/Fuel Ratio Malfunction
GS300 & SC300  Air/Fuel Ratio Malfunction
27
ES300 (2) Sub-Oxygen Sensor Circuit
GS300 & SC300 (2) Sub-Oxygen Sensor Circuit
31
ES300  Low Airflow Meter Voltage
GS300 & SC300  Low Airflow Meter Voltage
32 (3) High Airflow Meter Voltage
35 (4) Barometric Pressure Sensor Circuit
41
ES300  Throttle Position Sensor (TPS) Circuit
GS300 & SC300  Throttle Position Sensor (TPS) Signal
42  Vehicle Speed Sensor (VSS) Signal Circuit
43 (5) Starter Signal
47 (4) Throttle Position Sensor (TPS) Signal
51
ES300  Switch Condition Signal
GS300 & SC300  Switch Condition Signal
52  Knock Sensor Signal
53  Knock Sensor Signal
55  Knock Sensor Signal
71
ES300 (2) EGR System Malfunction
GS300 & SC300 (2) EGR System Malfunction
78 (4) Fuel Pump Control Circuit
(1) If diagnostic code displayed is not shown in this table, ECU is faulty.
(2) California models only.
(3) ES300 only.
(4) GS300 & SC300 only.
(5) Code 43 sets if vehicle is push-started (normal).
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