Parts for your 1994 Nissan Primera-Camshaft sensor

1994 Nissan Primera Camshaft Sensor

Technical documentation confirms the 1994 Nissan Primera (P10) does use a camshaft sensor. On the petrol GA16DE and SR20DE engines it’s integrated inside the distributor as an optical “cam/crank angle sensor” providing both phase and reference signals to the ECU. See: Nissan Primera P10 Factory Service Manual (EC section, 1990–1996), Nissan SR20DE and GA16DE Engine/ECM service manuals, and the Haynes Nissan Primera Service & Repair Manual for the period. Nissan also refers to this unit as the Camshaft Position Sensor (PHASE) and Crank Angle Sensor (REF) within the distributor.

On a 1994 Primera, the camshaft sensor’s main job is to tell the ECU exactly where the cam and crank are in their rotation. That lets the ECU fire the injectors in sequence and command precise ignition timing, which makes cold starts cleaner, throttle response crisper, and fuel use more sensible. Because it’s an optical sensor living inside the distributor housing, heat, oil vapour, and old wiring can make it grumpy over time.

Typical symptoms when it’s on the way out include hard starting, random stalling at lights, a rough idle, and sometimes a flat-out no-start. The check engine light may log “Code 11 (Crank Angle Sensor)” on OBD1 systems, and some later scan tools will display P0340-type cam sensor faults. If those show up, it’s worth checking the distributor first.

Servicing is straightforward and mostly about prevention. Keep the distributor plug clean and snug, and inspect the loom for brittle insulation near heat sources. If you open the cap (where fitted), look for oil ingress—a worn distributor shaft seal can fog the optical window and upset the sensor signal. Cleaning the optical wheel and window with proper electronics cleaner can help if there’s light contamination.

Replacement on these cars often means swapping the complete distributor assembly, as the sensor is built in. Choose a quality unit—cheap copies can misread at high revs or die early. After fitting, always set base ignition timing with a timing light per the factory procedure (consult the under‑bonnet sticker or FSM for the correct spec for your engine/market). It’s also smart to check engine and chassis earths, weak grounds can mimic sensor faults. With a healthy cam sensor signal, the P10 runs sweet, starts first turn, and keeps fuel numbers tidy—too easy.

• Signs it’s failing: hard/no start, misfire, stalling, Code 11/P0340
• Good habits: clean connectors, check loom, watch for oil inside distributor
• After replacement: verify base timing and clear ECU codes

Where is the camshaft sensor on a 1994 Nissan Primera?
It’s built into the distributor on the end of the camshaft (petrol GA16DE and SR20DE). There isn’t a separate external cam sensor like newer coil‑on‑plug setups. Nissan calls it a cam/crank angle sensor and it uses an optical disc to generate the signals the ECU needs.

Can it be driven with a failing camshaft sensor?
Sometimes, but it’s a gamble. A marginal sensor can let the car run rough, then cut out without warning, and eventually deliver a no‑start. If there are stalling or Code 11/P0340 faults, get it diagnosed and sorted sooner rather than later to avoid being stranded.

Do I need to set timing after replacing the distributor/sensor?
Yes. After installing a replacement distributor (with the integrated sensor), warm the engine, enter the base‑timing set mode per the factory procedure, and set timing with a light. The exact spec depends on engine and market, many SR20DEs are around 15° BTDC and GA16DEs commonly near 10–15° BTDC—always confirm on the under‑bonnet label or FSM.