Parts for your 2005 Mitsubishi Lancer-Throttle position sensors

2005 Mitsubishi Lancer throttle position sensor (TPS)

Technical references including the Mitsubishi Lancer CH (2002–2007) Workshop Manual – Engine Control (Group 13A), Autodata (AU/NZ) model data for the 2005 Lancer 4G94/4G69, and the Haynes Lancer manual (2002–2011 coverage) all show a throttle position sensor fitted to the throttle body on cable-operated throttle systems. So, for a 2005 Mitsubishi Lancer, the TPS is absolutely relevant and used.

On a 2005 Lancer, the TPS tells the engine control module how far the throttle’s open. That live angle signal is used to meter fuel, adjust ignition timing, manage idle-up with loads like A/C, and, on autos, to help with kickdown and shift timing. When the TPS is healthy, the Lancer feels crisp off the line, cruises smoothly, and uses fuel sensibly. When it’s not, you’ll often notice flat spots, a hanging or hunting idle, hesitant take-off, harsher shifts, or the MIL lighting up with codes like P0120–P0123.

There’s no fixed replacement interval for the TPS on these cars, it’s a “replace on condition” item. As part of regular servicing (say every 40–60,000 km), it’s smart to:

• Visually inspect the TPS connector and harness for corrosion, broken locks, or chafing.
• Check live data with a scan tool for a smooth throttle angle sweep from closed to wide open.
• If using a multimeter, verify reference voltage and a clean, linear signal (roughly ~0.5 V closed to ~4.5 V WOT).
• Clean the throttle body and ensure the cable and stop aren’t binding or misadjusted.

Replacing the TPS on a CH-series Lancer is straightforward. Disconnect the battery negative, unplug the sensor, then remove the two small screws on the throttle body. Note the D-shaft orientation, fit the new sensor, and snug the screws (don’t overdo it—threads are easy to strip). Reconnect, clear any codes, and perform an idle learn: with the engine fully warm, allow it to idle with all loads off for several minutes, or follow the factory scan-tool procedure if available. If the idle still wanders, recheck for vacuum leaks and throttle plate deposits before condemning new parts.

A quality replacement and a careful install usually restore clean throttle response and better fuel economy. Given how critical the TPS signal is to fuelling and shift logic, it’s worth fixing at the first sign of trouble rather than driving around a fault.

Popular questions about 2005 Mitsubishi Lancer TPS

Does a 2005 Mitsubishi Lancer have a TPS?
Yes. The CH-series Lancer (including 2005 models with 2.0L and 2.4L petrol engines) uses a throttle position sensor mounted on the throttle body. It’s a key input for fuelling, ignition, and auto transmission behaviour.

What are common symptoms of a failing TPS on a 2005 Lancer?
Drivers often notice hesitation, flat spots, erratic or high idle, poor fuel economy, and odd auto shifts. The check engine light may appear with codes like P0121–P0123. Live data usually shows a noisy or jumpy throttle angle trace.

Can you drive with a bad TPS?
You can sometimes limp along, but it’s not ideal. A faulty TPS can cause unsafe hesitation or sudden flare, upset shift timing, and increase fuel use. Sorting it sooner protects the catalytic converter and saves on petrol.