Parts for your 2005 Mitsubishi Lancer-Map sensor

2005 Mitsubishi Lancer MAP sensor — is it actually there?

For the 2005 Mitsubishi Lancer sold in Australia and New Zealand (CH/CS series, non-turbo petrol), a separate MAP sensor isn’t used. These cars run a mass air flow (MAF) strategy instead. This layout is confirmed in the Mitsubishi Lancer CH/CS Service Manual (2002–2007, Group 13A Multiport Fuel Injection), which details the air flow meter on the airbox outlet and lists no manifold absolute pressure sensor for the 4G93/4G94 engines. The Mitsubishi ASA electronic parts catalogue for the same models lists a MAF sensor but no “sensor, manifold pressure” for naturally aspirated trims, while high-performance turbo variants (e.g., Lancer Evolution) do have a manifold pressure/boost sensor on the intake manifold. Autodata’s engine management data for the 2005 2.0L likewise shows a MAF input and barometric pressure measured internally, not via an external MAP unit.

Why no MAP sensor on these Lancers? Mitsubishi engineered the NA CH/CS Lancer to meter air with a Karman vortex-type MAF. The ECU then blends that signal with throttle position, engine speed, intake air temperature and oxygen sensor feedback. With barometric pressure handled inside the ECU (or inferred), there’s no need for a separate MAP on the manifold.

Owners hunting for a “MAP sensor” are usually chasing an airflow or fuelling issue. On these cars, the likely suspects are:

• The MAF sensor on the airbox outlet tube (dirty or failing)
• Vacuum leaks (hoses, PCV, intake ducting splits)
• ECU or wiring faults flagged as generic “MAP/Baro” codes by some scan tools

If the car throws a MAP/Baro rationality code, don’t stress — that’s often just generic wording. Clean the MAF with proper MAF cleaner (never touch the sensing element), check for vacuum leaks, confirm the air filter isn’t over-oiled, and inspect connectors and earths. If you’ve got a turbo Lancer Evolution, different story — that model does run a manifold pressure/boost sensor on the intake manifold, and faults there can cause boost and drivability issues.

Technical references: Mitsubishi Lancer CH/CS Service Manual (2002–2007), Group 13A Engine Electrical, Mitsubishi ASA EPC (CH/CS 2005, Oceania), Autodata Engine Management & Wiring for Lancer 2.0 2005 (4G94).

Popular questions

Does a 2005 Mitsubishi Lancer have a MAP sensor?

On Australian and New Zealand 2005 CH/CS non-turbo models, no. They use a MAF sensor for airflow measurement. The exception is the turbocharged Lancer Evolution, which uses a manifold pressure/boost sensor.

Where is the MAP sensor on a 2005 Lancer?

On non-turbo CH/CS cars, there isn’t one. What most people are looking for is the MAF sensor on the outlet side of the airbox/intake tube. On an Evolution, the MAP/boost sensor is mounted on or near the intake manifold.

Why am I getting a MAP sensor code on my 2005 Lancer if there isn’t one?

Many scan tools use generic wording like “MAP/Baro” for pressure-related checks. On a non-turbo CH/CS, that can point to a dirty MAF, vacuum leak, wiring fault, or a barometric reading issue inside the ECU rather than a missing part.