Parts for your 2006 Mitsubishi Lancer-Throttle position sensors

2006 Mitsubishi Lancer throttle position sensor (TPS): what it does and when to replace it

Based on Mitsubishi’s Lancer CS/CH (2003–2007) service manuals, the brand’s ASA electronic parts catalogue, and the factory OBD-II diagnostic list (which includes TPS-related codes P0120–P0123 and P2135), the 2006 Mitsubishi Lancer does use a throttle position sensor. On cable-throttle variants (common in AU/NZ 1.6 and 2.0 models), the TPS is a separate, replaceable unit on the throttle body. On drive-by-wire variants (such as Evo IX and some 2.4 MIVEC applications), dual TPS tracks are integrated into the electronic throttle body.

On a 2006 Lancer, the TPS tells the engine computer exactly how far the throttle plate is opened. That signal is used to manage fuel delivery, ignition timing and idle control, smooth out tip-in and decel, and keep the auto trans shifting cleanly. It also helps the ECU judge load for air-con, cruise control and emissions. When it’s healthy, throttle response feels crisp and predictable, when it’s not, the car can feel doughy, surge at idle or throw a check engine light.

Common clues the TPS needs attention include hesitant acceleration, hunting or stalling at idle, poor fuel economy, and stored codes like P0121 or P0122. A quick inspection under the bonnet is worthwhile at service time: confirm the connector is tight, the wiring isn’t chafed and the throttle body isn’t gummed up. For cable-throttle cars, a light throttle-body clean helps, but avoid soaking the TPS itself—use contact cleaner only on the plug.

Techs often verify TPS health with a multimeter or scan tool: closed throttle typically reads around half a volt and sweeps smoothly to roughly 4.5 volts at wide open. Any flat spots or jumps mean it’s time to replace. On cable-throttle Lancers the TPS can usually be swapped individually, align the sensor per the workshop procedure and snug the screws without over-torquing. On drive-by-wire units, the TPS is part of the throttle body, so replace the complete assembly if faulted.

After replacement, clear codes and carry out an idle/throttle relearn (via scan tool or per the manual) so the ECU adapts correctly. Using quality OEM-spec parts and doing a short road test seals the deal for reliable day-to-day running.

• Symptoms to watch: hesitation, erratic idle, CEL with P0120–P0123/P2135
• Service tips: inspect connector, clean throttle body carefully, verify smooth voltage sweep
• Variants: separate TPS on cable-throttle, integrated TPS on drive-by-wire

Does a 2006 Mitsubishi Lancer have a TPS?
Yes. Factory manuals for the CS/CH series and the OEM parts catalogue specify a throttle position sensor for cable-throttle models and dual-track sensors within the electronic throttle body on drive-by-wire variants. Diagnostic routines for this model include TPS-related checks and fault codes, confirming it’s a standard part of the engine management system.

Where is the TPS on a 2006 Lancer?
On cable-throttle cars, it’s mounted on the side of the throttle body opposite the cable cam. On drive-by-wire versions, the TPS elements live inside the throttle body housing, so there’s no separate external sensor to replace.

How do you reset or relearn the throttle after TPS work?
Use a scan tool to run the throttle/idle relearn where available. If a scan tool isn’t handy, many Lancers will relearn after battery disconnect and a controlled idle period at operating temperature with all loads off, followed by a short drive. Check the service manual for the exact procedure for your engine code.