Parts for your 2005 Mitsubishi Outlander-Throttle position sensors

2005 Mitsubishi Outlander throttle position sensor (TPS): what it does and how to look after it

Yes, the 2005 Mitsubishi Outlander uses a throttle position sensor. Technical references that confirm this include the Mitsubishi Motors Outlander CU service manual (Engine/MFI section with DTCs P0120–P0123 and P2135 for TPS circuits), Mitsubishi ASA/CAPS parts catalogues showing a throttle body assembly with an integrated TPS on 4G69 engines, and workshop data providers such as Autodata/ALLDATA listing TPS testing and relearn procedures for this model year. Depending on market and build date, the TPS is either a separate sensor bolted to a cable-operated throttle body or a dual-track sensor integrated into the electronic throttle body.

The TPS tells the engine computer exactly how far the throttle plate is open. That info is used to juggle fuelling, ignition timing, idle control and, on autos, shift behaviour. On drive-by-wire versions it’s also a safety-critical, dual-channel signal the ECU cross-checks. When the TPS goes out of whack, the Outlander can feel doughy off the line, surge or hesitate, idle rough, chew more fuel, or flick the check engine light with codes like P0120–P0123 or P2135.

There’s no scheduled replacement for the TPS, but it’s smart to give it attention during major services and whenever the intake’s off under the bonnet. A few practical tips:

• Don’t force the throttle plate by hand on electronic throttle bodies, use a scan tool for actuation where needed.
• Clean the throttle bore with sensor-safe cleaner, keeping solvents away from the TPS and electronic actuators.
• Check the connector and loom for green crusties, broken locks, or rubbed-through insulation, the TPS relies on a steady 5 V reference and good earth.
• With a scan tool, look for a smooth throttle angle sweep from closed to WOT with no flat spots.

If replacement’s on the cards:

1. Disconnect the battery and remove the intake ducting.
2. For external TPS: unplug it, mark its position, swap the sensor and lightly snug the screws so the locating slots can fine-tune. For integrated units: replace the throttle body with a new gasket and torque evenly.
3. Reconnect, then carry out an idle/throttle relearn. Many shops use a scan tool, but the service manual also outlines a key-on/idle procedure to let the ECU relearn closed and open angles.

Choosing a decent-quality or OE part saves headaches. Cheap copies can drift or give noisy signals, which the ECU hates. If the Outlander still plays up after a TPS swap, look to intake air leaks, a sticky throttle plate, or a dodgy 5 V reference shared with other sensors.

Popular questions

Where is the throttle position sensor on a 2005 Mitsubishi Outlander?

On cable-throttle setups, the TPS is a small, black plastic sensor bolted to the side of the throttle body opposite the cable cam. On electronic throttle versions, the sensor is built into the throttle body assembly under a sealed cover, so it’s not serviced separately.

It’s all right at the front/top of the engine under the bonnet, where the intake pipe meets the throttle body.

Can the TPS be cleaned or adjusted?

You can clean the throttle bore, but avoid spraying solvent into the TPS or prying off any sealed covers. External TPS units aren’t really “serviceable”, though some have slotted mounting holes that allow slight rotational alignment, final calibration is handled by the ECU via a relearn.

Integrated electronic throttle bodies don’t offer TPS adjustment. If the sensor has failed, the fix is to replace the throttle body and perform a proper relearn with a scan tool.

Do I need a relearn after TPS or throttle body work?

Yes. The ECU needs to relearn the closed and open throttle angles for a stable idle and clean tip-in. A scan tool procedure is best, but the service manual also describes an ignition-on/idle routine that works in a pinch.

Skipping the relearn can leave the Outlander idling high or low, or flaring on take-off until the ECU adapts.