P2018 code meaning
Intake Manifold Runner Position Sensor/Switch Circuit Intermittent (Bank 1)
Powertrain system Generic code P20xx codes Check engine light
What P2018 means
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.
P2018 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2018
- Warning lamp that comes and goes
- Often no noticeable change in driving
Common causes of P2018
- Most likelyLoose or fretted pins in the sensor connector
- PossibleWire cracked by engine movement or heat near the manifold
- PossibleWorn resistive track in the position sensor
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Imrc position sensorImrc connectorImrc wiring
What each part of P2018 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 0 | Area: fuel and air metering and auxiliary emission controls. |
| 18 | The exact fault in that area. |
What to do next
- Note P2018 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2018
What does P2018 mean?
P2018 means "Intake Manifold Runner Position Sensor/Switch Circuit Intermittent (Bank 1)". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P2018?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2018 fail an emissions test?
Yes, it can. P2018 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2018 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2018 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.