Powertrain, generic (extended)

P2018 Intake Manifold Runner Position Sensor/Switch Circuit Intermittent (Bank 1)

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P2018 belongs to bank 1 and covers a flap position signal that drops out or jumps for short moments while it otherwise stays within limits, so neither the low nor the high code matures. Few makers publish it. Mitsubishi lists P2018 for the 2022 and 2023 Outlander with the 2.5 litre PR25DD engine as a bank 1 fault of the sensor that reports where the runner valve stands, logged after two trips with the warning lamp; a 2023 bulletin added its diagnostic page to the service manual. CARB requires such input components to be watched for circuit faults, which is why erratic feedback earns its own code. Loose pins, a cracked wire near the manifold or a worn sensor track are the usual suspects.

Likely causes

Loose or fretted pins in the sensor connector
Wire cracked by engine movement or heat near the manifold
Worn resistive track in the position sensor

Symptoms

  • Warning lamp that comes and goes
  • Often no noticeable change in driving

Repair estimate

DifficultyMediumDIY possible
Parts and labour€20–450
Time0.5–2.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

imrc position sensorimrc connectorimrc wiring

Related codes

P2014P2016P2017P2023

References: static.nhtsa.gov, law.cornell.edu.