DI–14
DIAGNOSTICS
–
ENGINE
DI37T–03
DIAGNOSTIC TROUBLE CODE CHART
HINT:
Parameters listed in the chart may not be exactly the same as your reading due to the type of instrument
or other factors.
If a malfunction code is displayed during the DTC check in check mode, check the circuit for that code listed
in the table below. For details of each code, turn to the page referred to under the ’’See page ’’ for the respec-
tive ’’DTC No.’’ in the DTC chart.
SAE CONTROLLED:
1
DTC No.
DetectionItem
TroubleArea
MIL*
Memory
SOpen or short in mass air flow meter circuit
P0100
Mass Air Flow Circuit Malfunc-
tion
SMass air flow meter
f
f
SECM
P0101
Mass Air Flow Circuit Range/
PerformanceProblem
SMass air flow meter
f
f
f
f
SOpen or short in intake air temp. sensor circuit
SIntake air temp. sensor (built into mass air flow meter)
SECM
P0110
Intake Air Temp. Circuit Malfunc-
tion
SOpen or short in engine coolant temp. sensor circuit
SEngine coolant temp. sensor
SECM
P0115
Engine Coolant Temp. Circuit
Malfunction
f
f
f
f
f
f
P0116
Engine Coolant Temp. Circuit
Range/PerformanceProblem
SCoolingsystem
SEngine coolant temp. sensor
SOpen or short in throttle position sensor circuit
SThrottlepositionsensor
SECM
P0120
Throttle/PedalPositionSensor/
Switch ”A” Circuit Malfunction
Throttle/PedalPositionSensor/
Switch ”A” Circuit Range/Perfor-
manceProblem
P0121
SThrottlepositionsensor
f
f
SECM
SOpen or short in heated oxygen sensor (bank 1 sensor 1)
circuit
SHeated oxygen sensor (bank 1 sensor 1)
SAir induction system
SFuelpressure
P0125
Insufficient Coolant Temp. for
Closed Loop Fuel Control
f
f
SInjector
SGas leakage on exhaust system
SECM
SOpen or short in heated oxygen sensor circuit
SHeated oxygen sensor
Heated Oxygen Sensor Circuit SAir induction system
P0130
Malfunction (Bank 1 Sensor 1) SEGR system
f
f
SFuelpressure
SInjector
(Except Calif.)
SECM
SOpen or short in heated oxygen sensor circuit
SHeated oxygen sensor
SAir induction system
SEGR system
P0133
Oxygen Sensor Circuit Slow Re-
sponse (Bank 1 Sensor 1)
f
f
SFuelpressure
SInjector
SECM
SOpen or short in heater circuit of heated oxygen sensor
P0135
Oxygen Sensor Heater Circuit
Malfunction (Bank 1 Sensor 1)
SHeated oxygen sensor heater
f
f
SECM
2000 CELICA (RM744U)