Fault signal lamp of automobile engine always light,what is matter?my car brand is toyota

SHORTS ON THAT FEED, BRAKE LAMPS
FIX SHORTS.
I ASSUMED ALL ELSE WORK ON CAR
EVEN DRIVES DAY OR NIGHT;
WORSE YET
I BET THE TRAILER HITCH HACK JOB SHORTED PARKS TO BRAKE FEED.
I ALWAYS EXPECT HACKS FIRST AND LOOK.

Your car stores computer fault codes in the engine/trans modules. They set the CHECK ENGINE light on to alert you a fault is now stored and there is a problem that requires diagnosis. You need to get the fault code scanned to proceed further. There are over 1300 DIFFERENT reasons to turn on the check engine light, some could be minor (a loose gascap), some major (CRANK SENSOR/CAM SENSOR CORRELATION...Car will stall when one finally fails!)
Checking the exact code is the only way to proceed.

This is a typica grounding error. You should try to add a good ground cable to your tail light. Sound strange but this often solves such issue:)

EOBD II Error Code: P0117
Fault Location:
Engine Coolant Temperature (ECT) Sensor (G62) - Low Input
Possible Cause:
Malfunction Indicator Lamp (MIL) Triggered on first occurrence.
Coolant thermostat.
Wiring short to earth.
Engine coolant temperature (ECT) sensor.

EOBD II Error Code: P0340
Fault Location:
Camshaft Position (CMP) Sensor A (G40), Bank 1 - Circuit Malfunction
Possible Cause:
Malfunction Indicator Lamp (MIL) active.
Wiring from/to Camshaft Position Sensor (CMP) faulty.
Camshaft position (CMP) sensor faulty.
Timing misaligned.
Possible Solutions:
Check Wiring from/to Camshaft Position Sensor.
Check Camshaft Position Sensor.
Check Timing.

EOBD II Error Code: P0500
Fault Location:
Vehicle Speed Sensor (VSS) - Circuit Malfunction
Possible Cause:
Malfunction Indicator Lamp (MIL) Non Emission Fault - No warning light.
Wiring.
Vehicle speed sensor (VSS).
Engine control module (ECM).

The check engine light also called the malfunction indicator comes only when the computer control unit (called the PCM) senses a fault in the electronic controls of the engine and/or the emission system, there are about 200 possible faults that turn the light on, to know what has developed a problem you must have the system tested, this is called an OBD2 fault code test, Kragen and Autozone parts stores do this testing for free.

A malfunction indicator lamp (MIL), commonly referred to as the "Check Engine Light" is an indicator of malfunction of the computerized engine management system. It is found on the instrument console of most automobiles. When illuminated, it is typically either an amber or red color. On vehicles equipped with OBD-II, the light has two stages: steady (indicating a minor fault such as a loose gas cap or failing oxygen sensor) and flashing (indicating a severe fault, that will eventually destroy the catalytic converter, such as a misfire). When the MIL is lit, the engine control unit stores a fault code related to the malfunction, which can be retrieved with a scan tool and used for further diagnosis. The malfunction indicator lamp is usually labeled with the text check engine, service engine soon, check engine soon, or a picture of an engine.
The MIL appeared in the early 80s along with computerized engine controls. Even the earliest systems, such as GM's CCC (Computer Command Carburetor) system had self diagnosis functionality. When the computer detected a fault, it illuminated the MIL. Up until OBDII, on most cars the MIL could output codes, when two pins on the ALDL are jumped, the light would flash the codes, for instance (blink) (pause) (blink) (blink) for code 12. Some manufacturers retained this feature even after OBDII, such as Honda.

Hope this help (remember comment and rated this). Good luck.

For 1991 TOYOTA Pickup replacement bulbs, review the list and check it in other brand with this model:

High & low beam headlamp
H6054
H6054ST Silverstar High Performance Lighting: The Whiter and Brighter Halogen
H6054XV XtraVision Halogen - The Brighter Light
H6054CB Cool Blue Halogen - The Whiter Light
H6054LL Long Life Halogen Upgrade: Lasts 6x longer

Parking light
168
168LL Long Life Upgrade: Up to twice the life of the standard lamp
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp

Front turn signal
1156
1156ST Silverstar Signal Lighting: Complete the Look: Crisp, Clean, Style
1156LL Long Life Upgrade: Up to twice the life of the standard lamp

Rear turn signal
1156
1156ST Silverstar Signal Lighting: Complete the Look: Crisp, Clean, Style
1156LL Long Life Upgrade: Up to twice the life of the standard lamp

Tail light
1157
1157LL Long Life Upgrade: Up to twice the life of the standard lamp

Stop light
1157
1157LL Long Life Upgrade: Up to twice the life of the standard lamp

License plate
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp
89

Back up light
1156
1156ST Silverstar Signal Lighting: Complete the Look: Crisp, Clean, Style
1156LL Long Life Upgrade: Up to twice the life of the standard lamp

Front sidemarker
194
194LL Long Life Upgrade: Up to twice the life of the standard lamp

Glove box
161
161LL Long Life Upgrade: Up to twice the life of the standard lamp

Step/Courtesy light
DE3022
DE3175
DE3175LL Long Life Upgrade: Up to twice the life of the standard lamp
7443LL Long Life Upgrade: Up to twice the life of the standard lamp

Hope helped with this (remember rated this help). Good luck.

bank 1 will be whichever side cylinder 1 of your engine is and bank 2 will be the opposite side. It's named bank 1 and bank 2 so that no matter how the engine is laid out, bank 1 is always on the same side as cylinder 1. I cannot say whether the right hand or the left hand one will be bank 1 as I do not know where your cylinder 1 is. The garage should know

Manufacturer Specific Codes

P1100 BARO Sensor Circuit - Read Our Article on Automotive Circuit Testing For Help With This Toyota Check Engine Light Code

P1120 Accelerator Pedal Position Sensor Circuit - Read Our Article on Automotive Circuit Testing For Help With This Toyota Check Engine Light Code

P1121 Accelerator Pedal Position Sensor Range/Performance Problem

P1125 Throttle Control Motor Circuit - Read Our Article on Automotive Circuit Testing For Help With This Toyota Check Engine Light Code

P1126 Magnetic Clutch Circuit

P1127 ETCS Actuator Power Source Circuit

P1128 Throttle Control Motor Lock

P1129 Electric Throttle Control System

P1130 Air/Fuel Sensor Circuit Range/Performance (Bank 1 Sensor 1) - Read Our Article On Oxygen Sensor Codes For Help With This Toyota Check Engine Light Code - More Related Information

P1133 Air/Fuel Sensor Circuit Response (Bank 1 Sensor 1) - Read Our Article On Oxygen Sensor Codes For Help With This Toyota Check Engine Light Code

P1135 Air/Fuel Sensor Heater Circuit Response (Bank 1 Sensor 1) - Read Our Article On Oxygen Sensor Codes For Help With This Toyota Check Engine Light Code - More Related Information

P1150 Air/Fuel Sensor Circuit Range/Performance (Bank 1 Sensor 2)

P1153 Air/Fuel Sensor Circuit Response (Bank 1 Sensor 2) - Read Our Article On Oxygen Sensor Codes For Help With This Toyota Check Engine Light Code

P1155 Air/Fuel Sensor Heater Circuit. (Bank 1 Sensor 2)

P1200 Fuel Pump Relay Circuit

P1300 Igniter Circuit Malfunction - No. 1

P1305 Igniter Circuit Malfunction - No. 2

P1335 No Crankshaft Position Sensor Signal - Engine Running

P1349 VVT System

P1400 Sub-Throttle Position Sensor

P1401 Sub-Throttle Position Sensor Range/Performance Problem

P1405 Turbo Pressure Sensor Circuit

P1406 Turbo Pressure Sensor Range/Performance Problem

P1410 EGR Valve Position Sensor Circuit Malfunction - Read Our Article on EGR Valve Codes For Help With This Toyota Check Engine Light Code

P1411 EGR Valve Position Sensor Circuit Range/Performance - Read Our Article on EGR Valve Codes For Help With This Toyota Check Engine Light Code

P1500 Starter Signal Circuit

P1510 Boost Pressure Control Circuit

P1511 Boost Pressure Low

P1512 Boost Pressure High

P1520 Stop Lamp Switch Signal Malfunction

P1565 Cruise Control Main Switch Circuit

P1600 ECM BATT Malfunction

P1605 Knock Control CPU

P1630 Traction Control System

P1633 ECM

P1652 Idle Air Control Valve Control Circuit

P1656 OCV Circuit

P1658 Wastegate Valve Control Circuit

P1661 EGR Circuit

P1662 EGR Bypass Valve Control Circuit

P1700 Vehicle Speed Sensor '2' Circuit Fault

P1705 Direct Clutch Speed Circuit Fault

P1765 Linear Shift Solenoid Circuit Fault

P1780 Park/Neutral Position Switch Malfunction (Only For A/T)

Back To Top Of Toyota Check Engine Light Codes Page

Are your VSC and Tracking lights on, plus check engine light. The check engine light causes the other lights to light up. Take off both battery cables and touch together for 20 seconds and then reconnect. the problem should reset. I had this happen after an oil change it is caused by the mechanics forgetting to reset a computer signal. I hope this works............