CS35 2013.04
3.1.13-243 3.1.13-243Electronic Control System - ME7
DTC P2127, P2128, P2138
1. DTC Description
2. Possible Sources
3. Diagnosis Procedures
Fault Code Description Definition
P2127
Electronic accelerator pedal
position sensor 2 signal voltage
too low
• ECM provides 5 V reference voltage to terminal 2
of electrical accelerator pedal position sensor 2 wir-
ing harness connector C16 through terminal 32 of
ECM wiring harness connector E01.
• Electrical accelerator pepal positions sensor 2 pro-
vides signal voltage to terminal 40 of ECM wiring
harness connector E01 through terminal 1 of wir-
ing harness connector C16.
• ECM position terminal 6 of electrical accelerator
pedal position sensor 1 wiring harness connector
C16 at low electrical potential through terminal 35
of ECM wiring harness connector E01.
P2128
Electronic accelerator pedal
position sensor 2 signal voltage
too high
P2138
Unreasonable electronic accel-
erator pedal position sensor sig-
nal
Fault
Code
Test Tactics
Setting Conditions (Control
Strategy)
Fault
P2127
Hardware, circuit
fault
Signal circuit voltage too low, short cir-
cuit to ground
• Sensor circuit
• Sensor
•ECM
P2128
Signal circuit voltage too high, short cir-
cuit to power supply
P2138
ECM compares the APP1 and APP2
input signal, APP1 input signal at all
times is two times of APP2, if ECM
monitor the APP1 and APP2 input sig-
nal can not satisfy this rule, it will report
this DTC.
Test Conditions Details/Results/Actions
1. General inspection
A. Inspect the sensor wiring harness connector for
loose signs.
B. Inspect the sensor appearance for damage.
Is it normal?
Y
Go to step 2.
N
Repair the fault.
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