LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 1991 >> Tercel Base, C140 >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 4-CYL >> Code Identification
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Code Identification

CODE IDENTIFICATION

Code No. System Affected Probable Cause
12 & 13  RPM Signal Distributor Or Circuit, Starter Circuit, ECU
14  Ignition Signal Ignitor Or Circuit To ECU, ECU
21  Oxygen Sensor Signal Oxygen Sensor Or Circuit, ECU
22  Coolant Temp. Sensor Signal Coolant Temp. Sensor Or Circuit, ECU
24 (1) Intake Air Temp. Sensor Signal Intake Air Temp. Sensor Or Circuit, ECU
25  Lean Air/Fuel Mixture Injector Or Circuit, Oxygen Sensor Or Circuit, Fuel Pressure, Ignition System, Coolant Temp. Sensor, Vacuum Sensor, ECU
26 (3) Rich Air/Fuel Mixture Vacuum Sensor, ECU, Injector Or Circuit, Oxygen Sensor Or Circuit, Fuel Pressure, Cold Start Injector Or Circuit, Coolant Temp. Sensor
31  Vacuum Sensor Vacuum Sensor Or Circuit, ECU
41 (1) Throttle Position Sensor Signal Throttle Position Sensor Or Circuit, ECU
42 (2) Vehicle Speed Sensor Signal Vehicle Speed Sensor Or Circuit, ECU
43 (2) Starter Signal Starter Signal Circuit, Ignition Switch Or Circuit, Main Relay, ECU
51 (2) Switch Condition Signal A/C Switch Circuit, ECU, Neutral/Start Switch Or Circuit, TPS Or Circuit
71 (3) EGR System Malfunction EGR System, EGR Temp. Sensor Or Circuit, ECU, EGR VSV
(1) CHECK ENGINE light comes on when code sets on Calif. models only.
(2) CHECK ENGINE light will not come on when code is set.
(3) Used on Calif. only.
scientia non olet · About LEMON Manuals