Parts for your 1998 Mitsubishi Lancer-Camshaft sensor

1998 Mitsubishi Lancer Camshaft Sensor — What It Does and How to Look After It

Based on technical sources for the CE-series Lancer (1996–2003), a camshaft position signal is used on 1998 Mitsubishi Lancer engines. The Mitsubishi Lancer CE Factory Service Manual (Engine Electrical) details a camshaft position signal (often called CMP/TDC) provided by a sensor inside the distributor on 4G15/4G93 SOHC engines, and a separate camshaft position sensor on the cylinder head for certain DOHC variants. The Mitsubishi ASA parts catalogue for CE Lancer lists a “sensor, cam position” for DOHC, and an integrated cam angle sensor in the distributor for SOHC. Haynes/Motor manual coverage for 1997–2002 Mirage/Lancer also includes diagnostics for CMP faults (e.g., P0340/P0341). So yes—this vehicle uses a camshaft sensor, either stand-alone or integrated into the distributor depending on the engine fitted.

On a 1998 Mitsubishi Lancer, the camshaft sensor tells the ECU which stroke each cylinder is on so it can fire the injectors and ignition at the right time. It’s the phase reference that works with the crank sensor to keep everything tidy. When it’s on-song, cold starts, idle and fuel economy are all better. When it’s crook, expect hard starting, a stumble off the line, or a check engine light.

Technically, the setup varies a bit across engines. Many Aussie/NZ CE Lancers with the 4G15/4G93 SOHC use a distributor that houses the cam angle sensor internally. Some DOHC variants mount a separate sensor on the head near the cam gear. Both do the same job—provide the ECU with cam timing info.

It’s not a scheduled replacement item, but it’s worth a look during servicing if there are starting niggles or intermittent misfires. Common signs include:

• Hard starting, rough idle, or random stalling
• Sluggish acceleration and poor fuel use
• Check engine light with codes like P0340 or P0341

Basic checks a workshop will do:

• Scan for codes and live data to confirm the CMP signal is present
• Inspect the connector and wiring for oil ingress, corrosion or broken pins
• On distributor models, check the shaft play and internal sensor condition

Replacement tips (engine-dependent):

• Disconnect the battery. For distributor types, mark the housing position before loosening so timing isn’t nudged out. For DOHC external sensors, replace the O-ring and torque the retaining bolt correctly.
• Clean the connector, click it home firmly, and use dielectric grease sparingly to keep moisture out.
• Clear codes and perform an idle relearn (let it idle up to temp with accessories off). A short road test helps the ECU settle trims.

Good-quality OEM or reputable aftermarket sensors are the go. If oil leaks have been weeping onto the connector, sort those at the same time—heat and oil are what usually kill these sensors. Look after the wiring, and the camshaft sensor will generally be a fit-and-forget part on a 1998 Lancer.

Popular questions about 1998 Mitsubishi Lancer camshaft sensor

Where is the camshaft sensor on a 1998 Lancer?
On most SOHC 4G15/4G93 models, it’s built into the distributor—so you replace or service the distributor’s internal sensor. On DOHC variants, it’s usually a separate sensor on the cylinder head near the cam gear. If unsure, check the engine code and a wiring diagram from the service manual.

What are the symptoms of a failing camshaft sensor?
Hard starts, rough idle, random stalling, loss of power, and a check engine light are common. Scan tools often show P0340/P0341. Because the ECU can lose phase info, the engine may crank longer and feel flat off the line.

Can the car run without a working camshaft sensor?
Sometimes it’ll limp on using the crank signal, but starting will be hit-and-miss and performance will suffer. On distributor-equipped cars, a failed internal sensor can cause no-spark, resulting in a no-start. Best fix is proper diagnosis and replacement.