Parts for your 1998 Toyota Crown-Camshaft sensor

1998 Toyota Crown camshaft sensor — what it does and how to look after it

Based on Toyota technical literature for the S150-series Crown (1995–1999) and the 1G‑FE, 1JZ‑GE and 2JZ‑GE engine control manuals, plus DENSO documentation on NE/G signals, the 1998 Toyota Crown is fitted with a camshaft position sensor (often called the “G” sensor in Toyota wiring diagrams). It’s relevant across these engines for phase detection, sequential injection and, on VVT‑i variants, cam timing control.

The camshaft sensor tells the ECU exactly where the intake or exhaust cam is in its rotation. That lets the ECU fire the injectors in sequence, time ignition cleanly at start‑up, and manage VVT‑i angles. When it goes out of spec, drivers might see long cranking, misfires at idle, sluggish take‑off, poor fuel economy, or a check engine light with codes like P0340/P0341.

• Why it matters on a ’98 Crown: sequential fuel injection accuracy, crisp hot and cold starts, stable idle, and correct VVT‑i operation on applicable engines.
• Common hints it’s unhappy: intermittent stall when hot, hard starting after refuelling, random loss of power, or oil seeping from the sensor O‑ring onto the connector.

There’s no routine replacement interval for the camshaft sensor, but it’s smart to inspect it whenever the timing belt area is open (typically every 100,000 km). Check the harness for brittle insulation, the connector for green corrosion, and the O‑ring for oil sweat. A scan tool that shows “G” sync and cam/crank correlation is handy, compare live data and resistance/voltage checks against the Toyota spec for your exact engine code.

Replacement is straightforward with basic tools. Disconnect the battery, unplug the connector, remove the hold‑down bolt, and ease the sensor out. Lightly oil a new O‑ring, seat the new sensor, and tighten the bolt to factory spec (around 8–10 N·m is typical for this size fastener, verify in the manual for your engine). Clear fault codes and confirm cam/crank sync in live data. On JZ engines the sensor sits at the front of the cylinder head near the timing belt cover, some 1G‑FE variants place it near the rear of the head or integrate the pickup in the distributor housing—match the part by engine code and connector.

• Pro tip: some non‑VVT‑i JZ variants use twin “G” pickups, replace like‑for‑like.
• Use quality OEM or reputable aftermarket sensors to avoid flaky hot‑soak faults.

Technical sources referenced: Toyota Crown S150 Series Repair Manual (engine control and EWD sections), Toyota 1JZ/2JZ and 1G‑FE Engine Control System manuals, and DENSO EFI signal documentation for NE/G systems.

Popular questions

Does a 1998 Toyota Crown have a camshaft sensor?
Yes. Across the common 1998 Crown engines (1G‑FE, 1JZ‑GE, 2JZ‑GE), Toyota specifies a camshaft position sensor (“G” signal) for phase reference, sequential injection and VVT‑i where fitted. This is detailed in Toyota’s engine control and wiring manuals for the S150 Crown.

Where is the camshaft sensor on a 1998 Crown?
On JZ engines it’s typically at the front of the cylinder head by the timing belt cover. On some 1G‑FE variants it’s located near the rear of the head or within a distributor‑style housing depending on market. Always confirm by engine code and connector style.

Can a 1998 Crown run with a bad cam sensor?
It might crank longer, run roughly or not start at all. Some ECUs can limp on crank‑only input, but you’ll usually get a check engine light and compromised performance. It’s best to test and replace the sensor if it’s out of spec.