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TRAC OFF flashing CHECK ENGINE LIGHT on

34K views 18 replies 15 participants last post by  19d 
#1 ·
Hi I have a 2003 Lexus IS300 and while I was driving today this came up out of nowhere didn't hear any noises per say and so far is driving right. Turned it off and on and still has it. Today was cold and rainy but I was driving for a while before this came on. Of course the trac light came on a couple of times while driving since its raining and roads over ain't good (NYC) but all of sudden the trac off light is flashing and check engine light is on no matter what so any clues guys?:(

I'm going to get the codes it is throwing out when I can but wondering there is something you guys know. :confused:
 
#2 ·
For me it was a random misfire. It was because I had my cam gear retarded 0.5 degrees too much which caused a rough idle with the BC cams. I advanced it from -4.0 to -3.5 degrees and the problem never returned.
 
#11 · (Edited)
These are the possible answers to what could be wrong, based only on those lights being on (protip: get a cheap code reader):

P0100
MAF Malfunction
P0101
MAF Circuit Range/Performance
P0110
IAT Circuit Malfunction
P0115
ECT Circuit Malfunction
P0116
ECT Circuit Range/Performance
P0120
TP Position Sensor/Switch ‘‘A’’ Circuit Malfunction
P0121
TP Position Sensor/Switch ‘‘A’’ Circuit Range/Performance
P0125
Insufficient Coolant Temperature For Closed Loop Fuel Control
P0130
HO2S Circuit Malfunction, Bank 1 Sensor 1
P0133
HO2S Circuit Slow Response, Bank 1 Sensor 1
P0135
HO2S Heater Circuit Malfunction, Bank 1 Sensor 1
P0136
HO2S Circuit Malfunction, Bank 1 Sensor 2
P0141
HO2S Heater Circuit Malfunction, Bank 1 Sensor 2
P0150
HO2S Circuit Malfunction, Bank 2 Sensor 1
P0153
HO2S Circuit Slow Response, Bank 2 Sensor 1
P0155
HO2S Heater Circuit Malfunction, Bank 2 Sensor 1
P0156
HO2S Sensor Circuit Malfunction, Bank 2 Sensor 2
P0161
HO2S Heater Circuit Malfunction, Bank 2 Sensor 2
P0170
Fuel Trim Malfunction
P0171
System Too Lean (Fuel Trim)
P0172
System Too Rich (Fuel Trim)
P0174
System Too Lean (A/F Lean Malfunction, Bank 2)
P0175
System Too Rich (A/F Rich Malfunction, Bank 2)
P0300
Random Misfire Detected
P0301
Misfire Detected, Cylinder 1
P0302
Misfire Detected, Cylinder 2
P0303
Misfire Detected, Cylinder 3
P0304
Misfire Detected, Cylinder 4
P0305
Misfire Detected, Cylinder 5
P0306
Misfire Detected, Cylinder 6
P0307
Misfire Detected, Cylinder 7
P0308
Misfire Detected, Cylinder 8
P0325
KS 1 Circuit Malfunction
P0330
KS 2 Circuit Malfunction
P0335
CKP Sensor ‘‘A’’ Circuit Malfunction
P0340
CMP Circuit Malfunction
P0385
CKP Sensor ‘‘B’’ Circuit Malfunction
P0401
EGR Insufficient Flow
P0402
EGR Excessive Flow
P0403
EGR Circuit Malfunction
P0420
Catalyst System Efficiency Below Threshold Bank 1
P0430
Catalyst System Efficiency Below Threshold Bank 2
P0440
EVAP Emission Control System Malfunction
P0441
EVAP Emission Control System Improper Purge Flow
P0446
EVAP Emission Control System Vent Control Malfunction
P0450
EVAP Emission Control System Pressure Switch Malfunction
P0451
EVAP Control System Pressure Sensor Range/Performance
P0500
VSS Malfunction
P0505
Idle Control System Malfunction
P0510
Closed TP Switch Malfunction
P0550
Power Steering Pressure Sensor Circuit Malfunction
P1100
BARO Sensor Circuit Malfunction
P1120
Accelerator Pedal Position Sensor Circuit Malfunction
P1121
Accelerator Pedal Position Sensor Range/Performance Problem
P1125
Throttle Control Motor Circuit Malfunction
P1126
Magnetic Clutch Circuit Malfunction
P1127
ECTS Actuator Power Source Circuit Malfunction
P1128
Throttle Control Motor Lock Malfunction
P1129
Electronic Throttle Control System
P1130
Air/Fuel Ratio Sensor Circuit Range/Performance Malfunction (Bank 1 Sensor 1)
P1133
Air/Fuel Ratio Sensor Circuit Response Malfunction (Bank 1 Sensor 1)
P1135
Air/Fuel Ratio Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P1150
Air/Fuel Ratio Sensor Circuit Range/Performance Malfunction (Bank 2 Sensor 1)
P1153
Air/Fuel Ratio Sensor Circuit Response Malfunction (Bank 2 Sensor 1)
P1155
Air/Fuel Ratio Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P1200
Fuel Pump Relay/ECU Circuit Malfunction
P1300
Igniter Circuit Malfunction (Bank 1 Or No. 1)
P1305
Igniter Circuit Malfunction, (Bank 2 Or No. 2)
P1310
Igniter Circuit Malfunction (No. 3)
P1315
Igniter Circuit Malfunction (No. 4)
P1320
Igniter Circuit Malfunction (No. 5)
P1325
Igniter Circuit Malfunction (No. 6)
P1330
Igniter Circuit Malfunction (No. 7)
P1335
CKP Sensor Circuit Malfunction During Engine Running
P1340
Igniter Circuit Malfunction (No. 8)
P1345
VVT Sensor Circuit Malfunction (Bank 1)
P1346
VVT Sensor Rang/Performance Problem (Bank 1)
P1349
VVT System Malfunction (Bank 1)
P1350
VVT Sensor Circuit Malfunction (Bank 2)
P1351
VVT Sensor Range/Performance Problem (Bank 2)
P1354
VVT System Malfunction (Bank 2)
P1400
Sub-TP Sensor Malfunction
P1401
Sub-TP Sensor Range/Performance
P1410
EGR Valve Position Sensor Circuit Malfunction
P1411
EGR Valve Position Sensor Circuit Range/Performance Malfunction
P1500
Starter Signal Circuit Malfunction
P1520
Stop Lamp Switch Malfunction
P1565
Cruise Control Main Switch Circuit Malfunction
P1566
Cruise Control Main Switch Circuit Malfunction
P1600
ECM BATT Malfunction
P1605
Knock Control CPU Malfunction
P1633
ECM Malfunction (ETCS Circuit)
P1645
Body ECU Malfunction
P1656
OCV Circuit Malfunction (Bank 1)
P1663
OCV Circuit Malfunction (Bank 2)
P1780
PNP Switch Malfunction
B2785
Ignition Switch On Malfunction (Immobilizer System)
B2786
Ignition Switch Off Malfunction (Immobilizer System)
B2785
Ignition Switch On Malfunction (Immobilizer System)
B2791
Key Unlock Warning Switch Malfunction (Immobilizer System)
B2795
Unmatch Key Code (Immobilizer System)
B2796
No Communication In Immobilizer System
B2797
Communication Malfunction No. 1 (Immobilizer System)
B2798
Communication Malfunction No. 2 (Immobilizer System)
 
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#13 ·
i have an 04 5 speed w/ 160k mi stock with aftermarket air filter and same exact thing happened while driving in the cold/rain. The code i got was p0420.
My guess is o2 sensor or cat perhaps? ...since car is running fine
p0420 catalyst system efficiency below threshold bank 1
:) :) :)
 
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