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Symptom:
P0123-THROTTLE POSITION SENSOR/APPS HIGH
When Monitored and Set Condition:
P0123-THROTTLE POSITION SENSOR/APPS HIGH
When Monitored: Continuously with the ignition on and engine running.
Set Condition: This DTC will set if the monitored TPS voltage rises above 4.94 volts for
the period of 0.48 seconds.
RELATED TPS ENGINE DTC'S PRESENT
POWERTRAIN CONTROL MODULE
INTERMITTENT WIRING AND CONNECTORS
TEST
1
NOTE: Low fluid level can be the cause of many transmission problems. If
the fluid level is low locate and repair the leak then check and adjust the
fluid level per the Service Information.
NOTE: Always perform diagnostics with a fully charged battery to avoid
false symptoms.
With the DRBIII , read Engine DTC's. Check and repair all Engine DTC's prior to
performing any transmission symptom diagnostics.
With the DRBIII , read Transmission DTC's. Record all DTC's and 1 Trip Failures.
NOTE: Diagnose 1 Trip Failures as a fully matured DTC.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Repair as necessary.
Perform the Shift Lever Position Test. If the test does not pass, refer to Symptom test
for P0706 Check Shifter Signal.
For Gear Ratio DTC's, check and record all CVI's.
Most DTC's set on start up but some must be set by driving the vehicle such that all
diagnostic monitors have run.
NOTE: Verify flash level of Powertrain Control Module. Some problems are
corrected by software upgrades to the Transmission and Engine software.
NOTE: Check for applicable TSB's related to the problem.
Perform this procedure prior to Symptom diagnosis.
Continue
2
With the DRBIII , check Engine DTC's, this includes all one trip failures.
Are there any Engine TPS DTCs present?
Yes → Refer to the Powertrain category and perform the appropriate
No
POSSIBLE CAUSES
ACTION
Go To 2
symptom.
Perform 41TE (NGC) TRANSMISSION VERIFICATION TEST -
VER 1.
→ Go To 3
TRANSMISSION - NGC
17
APPLICABILITY
All
All
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