DTC P2135 (1.5 L Engine)

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DTC P2135: Throttle Position (TP) Sensor A/B Incorrect Voltage Correlation

General Description

Courtesy of HONDA, U.S.A., INC.

Courtesy of HONDA, U.S.A., INC.

The electronic throttle control system controls the throttle valve opening. The system includes the throttle actuator, the throttle valve, throttle position (TP) sensors A and B, the PGM-FI subrelay circuit, the accelerator pedal position (APP) sensor, and the powertrain control module (PCM). When the accelerator pedal is pressed, the APP sensor detects the accelerator pedal opening value. The accelerator pedal opening value is converted to a signal in the APP sensor and transmitted to the PCM to compute the target position. The PCM then operates the throttle actuator to move the throttle valve to the target position. The actual throttle valve position is determined by TP sensor A (installed in the throttle body). The PCM adds the TP sensor A and TP sensor B values, and compares the addition value with 5 V. If the deviation exceeds a certain value for a specified time, the PCM detects a malfunction in the relationship between TP sensor A and TP sensor B, and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type

Execution	Continuous
Sequence	None
Duration	200 milliseconds or more
DTC Type	One drive cycle, MIL on

Enable Conditions

Condition
Vehicle	ON mode

Malfunction Threshold

The deviation between 5 V and addition value of TP sensor A and TP sensor B exceeds the threshold value which depends on TP sensor B voltage for at least 200 milliseconds as shown in the following graph.

Courtesy of HONDA, U.S.A., INC.

Possible Cause

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.

TP sensor A THL1 line short to TP sensor B THL2 line
TP sensor A failure
TP sensor B failure
PCM internal circuit failure

Confirmation Procedure

Operating Condition

Turn the vehicle to the ON mode.

With the HDS

Select the ETCS (TAC) TEST in the FUNCTION TEST with the HDS.

Diagnosis Details

Conditions for setting the DTC

When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM memory.

Conditions for clearing the DTC

The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the 12 volt battery.