-
DIAGNOSTICS
ENGINE
DI-41
195
Author:
Date:
2001 SIENNA (RM787U)
DTC
P0121
Throttle/Pedal Position Sensor/Switch ”A”
Circuit Range/Performance Problem
CIRCUIT DESCRIPTION
Refer to DTC P0120 on page
.
DTC No.
DTC Detecting Condition
Trouble Area
P0121
After vehicle speed has been exceeded 30 km/h (19 mph)
even once, output value of throttle position sensor is out of
applicable range while vehicle speed between 30 km/h (19
mph) and 0 km/h (0 mph)
(2 trip detection logic)
Throttle position sensor
INSPECTION PROCEDURE
HINT:
Read freeze frame data using TOYOTA hand-held tester or OBD II scan tool. Because freeze frame records
the engine conditions when the malfunction is detected, when troubleshooting it is useful for determining
whether the vehicle was running or stopped, the engine warmed up or not, the air-fuel ratio lean or rich, etc.
at the time of the malfunction.
1
Are there any other codes (besides DTC P0121) being output ?
YES
Go to relevant DTC chart.
NO
Replace throttle position sensor.
DI21Y-03
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