DTC Advanced Diagnostics: P2135 (K20C1) - Honda Civic FC/FK 2016-2021

DTC Advanced Diagnostics: P2135

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

General Description

The powertrain control module (PCM) monitors the throttle position (TP) sensor A circuit and the throttle position (TP) sensor B circuit. In order to provide electrical diagnostics the output voltage of both sensors are continuously monitored and compared with other sensors. If the TP sensor B output voltage is a specified value for a specified time, the PCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type

Execution	Continuous
Sequence	None
Duration	0.5 second or more
DTC Type	One drive cycle, MIL on

Enable Conditions

Condition
State of the engine	Running

Malfunction Threshold

Either of the conditions is met:

	The absolute difference between the actual throttle position based on the voltage from TP sensor A and the relative air charge signal is greater than 9.02 %.
	The absolute difference between the actual throttle position based on the voltage from TP sensor B and the relative air charge signal is greater than 9.02 %.

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.

	Throttle body failure (TP sensor A/B)
	PCM internal circuit failure

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.