DTC Advanced Diagnostics: P2118 (K20C1) - Honda Civic FC/FK 2016-2021

DTC Advanced Diagnostics: P2118

DTC P2118:Throttle Actuator Current Range/Performance Problem

General Description

The powertrain control module (PCM) monitors the throttle actuator control circuit for electrical malfunctions. The throttle actuator control circuit checks will detect short circuit to ground, short circuit to power, open circuit, and over temperature failures. If the throttle actuator control circuit is in a specified condition, 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

Throttle actuator circuit open

Condition
State of the engine	Running
Other	Throttle actuator power stage off

Throttle actuator circuit short, Throttle actuator over temperature

Condition
State of the engine	Running

Malfunction Threshold

	Throttle actuator circuit open Low side output voltage is 2.24 V or more and high side output voltage is 1.76 V or less.
	Throttle actuator driver over temperature Throttle actuator driver temperature is more than 347 °F (175 °C).
	Throttle actuator circuit short The current of any H-bridge for the throttle actuator in the PCM is 11.5 A or more.

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.

	High ambient temperature
	Throttle actuator MTR1 line short to ground
	Throttle actuator MTR2 line short to ground
	Throttle actuator MTR1 line short to throttle actuator MTR2 line
	Throttle body failure
	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.