Parts for your 1998 Nissan Primera-Crank angle sensor

1998 Nissan Primera crank angle sensor

Based on the Nissan Primera P11 Factory Service Manual (EF&,EC section, 1996–1999), the 1998 Primera uses a crank angle sensor. On petrol variants (GA16DE, SR18DE, SR20DE), it’s the optical sensor built into the distributor, often called the CAS. This is corroborated by the Haynes Service &, Repair Manual for Primera 1996–2001 and Autodata engine management references. So yes—this part is fitted and relevant on the 1998 Nissan Primera.

The crank angle sensor tells the ECU exactly where the crankshaft and camshaft are in their rotation, letting it time spark and fuel with precision. On the P11 petrol engines, the CAS uses an optical disc inside the distributor to generate both high-resolution (engine speed) and reference (TDC/cylinder) signals. If that signal drops out or goes noisy, the car can be hard to start, misfire, stall, or refuse to run altogether.

Typical clues it’s on the way out include long cranking, intermittent no-start when hot, sudden cut-outs at traffic lights, rough idle, and fault codes like P0335 (crank signal) or P0340 (cam signal) on a scan tool. Because the CAS is integral to ignition timing, it’s not something to ignore.

Servicing-wise, there’s no scheduled replacement interval, but it’s smart to inspect the distributor and connector at major services (every 40,000–60,000 km). Look for oil wicking through the distributor shaft seal, brittle wiring, moisture inside the cap, and play in the distributor shaft. Clean the plug with proper contact cleaner and ensure good earths. Avoid blasting the area with a pressure washer—water ingress is a classic cause of CAS grief.

If replacement’s needed on petrol P11s, the usual approach is to swap the distributor assembly, as the optical unit is housed within it. Mark the distributor position before removal to keep base timing close, fit the new unit with a fresh O-ring, then check ignition timing with a timing light once warmed up. Always clear fault codes and perform an idle learn procedure after the job. Choose a quality OE or reputable aftermarket unit, cheap copies can introduce flaky signals and random stalls.

For diesel variants, the ECU relies on a crank/reference pickup at the flywheel or within the pump system—ensure the sensor face is clean and wiring is intact if chasing a no-start or random cut-out.

• Pro tip: heat-soak failures are common—if it dies hot and restarts cold, think CAS/distributor.
• Healthy battery voltage matters, low volts can mimic sensor faults.

FAQs

Where is the crank angle sensor on a 1998 Nissan Primera?
On most 1998 petrol P11s (GA16DE, SR20DE), it’s built into the distributor on the end of the camshaft—lift the bonnet and look for the round distributor housing with a multi-pin plug. Some diesels use a separate sensor at the bellhousing or within the pump system to detect engine position.

Can it be driven with a failing crank angle sensor?
It might run intermittently, but it can stall without warning or refuse to restart once hot. That’s risky in traffic and can leave the driver stranded. Best to scan for codes, confirm signal integrity, and sort it promptly.

How do you test the CAS on a P11?
Use a scan tool to check for RPM during cranking, read fault codes, and inspect live data for dropouts. On optical distributor units, check for clean 12 V supply, 5 V reference (if applicable), good earth, and a stable signal. Oscilloscope testing is ideal, resistance checks aren’t reliable for optical sensors.