LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 1995 >> SC 400 >> Repair and Diagnosis >> Quick Lookups >> DTC Index >> Engine Performance DTCS
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Engine Performance DTCS

ENGINE PERFORMANCE DTCS

OEM Code Description
12 RPM SIGNAL CIRCUIT (NO. 1)
13 RPM SIGNAL CIRCUIT (NO. 2)
14 IGNITION SIGNAL (IGNITOR NO. 1)
15 IGNITION SIGNAL (IGNITOR NO. 2)
16 A/T CONTROL SIGNAL MALFUNCTION
21 MAIN O2 SENSOR SIGNAL LEFT OR RIGHT BANK
22 ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT
24 INTAKE AIR TEMPERATURE SENSOR CIRCUIT
25 AIR/FUEL RATIO MALFUNCTION (LEAN)
26 AIR/FUEL RATIO MALFUNCTION (RICH)
27 SUB-OXYGEN SENSOR CIRCUIT (LEFT BANK)
28 MAIN O2 SENSOR SIGNAL LEFT OR RIGHT BANK
29 SUB-OXYGEN SENSOR CIRCUIT (RIGHT BANK)
31 AIRFLOW METER CIRCUIT
35 BAROMETRIC PRESSURE SENSOR CIRCUIT
41 TPS SIGNAL & SUB-TPS SIGNAL
42 VEHICLE SPEED SENSOR (VSS) CIRCUIT
43 STARTER SIGNAL
47 TPS SIGNAL & SUB-TPS SIGNAL
51 SWITCH CONDITION SIGNAL
52 NO. 1 KNOCK SENSOR SIGNAL, KNOCK CONTROL SIGNAL & NO. 2 KNOCK SENSOR SIGNAL
53 NO. 1 KNOCK SENSOR SIGNAL, KNOCK CONTROL SIGNAL & NO. 2 KNOCK SENSOR SIGNAL
55 NO. 1 KNOCK SENSOR SIGNAL, KNOCK CONTROL SIGNAL & NO. 2 KNOCK SENSOR SIGNAL
71 EGR SYSTEM MALFUNCTION
78 FUEL PUMP CONTROL CIRCUIT