Step-By-Step P1364 Repair Solution for Lexus Is350

If your Lexus IS350 throws a P1364 code, the engine may run rough, stall at idle, or fail to start especially after warming up. This isn’t just a warning light; it’s a signal that the ignition timing sensor circuit is malfunctioning. Unlike generic OBD-II codes, P1364 is manufacturer-specific and points directly to the camshaft position sensor (or sometimes the crankshaft position sensor) on Toyota/Lexus V6 engines like the 2GR-FE. Getting this right matters because misdiagnosis leads to wasted time, unnecessary parts, and recurring issues.

What does P1364 mean on a Lexus IS350?

P1364 stands for “Ignition Timing Sensor Circuit Malfunction.” On the 2006–2013 IS350, this refers to the camshaft position sensor (CMP) on bank 1 (the side with cylinder 1). It’s not about spark plugs or coils it’s about the sensor telling the ECU where the camshaft is so fuel and spark timing stay precise. If the signal drops out, weakens, or becomes erratic, the ECU triggers P1364 and often no other related codes.

Why does P1364 appear more often on older IS350s?

The IS350’s CMP sensor mounts near the front of the intake camshaft, behind the timing cover. Over time, heat cycling, oil exposure, and vibration cause the sensor’s internal coil or connector pins to degrade. You’ll often see symptoms worsen after highway driving or on hot days. A common real-world sign: the car starts fine when cold, but stalls or hesitates after sitting in traffic for 10–15 minutes. That’s classic P1364 behavior not random stalling or misfires from worn coils.

Step-by-step P1364 repair solution for Lexus IS350

This is what actually works no guesswork, no swapping parts blindly:

Confirm the code with a scan tool that reads live data. Look for “Camshaft Position Sensor Bank 1” values. If the reading drops to 0 RPM or shows “N/A” while cranking, suspect the sensor or wiring not the ECU.
Inspect the sensor connector under the intake manifold. Unplug it and check for oil contamination, bent pins, or corrosion. Wipe clean with electrical contact cleaner and inspect the rubber grommet seal if cracked or missing, oil seepage will return.
Test resistance across the sensor terminals (with multimeter set to ohms). Spec is ~800–1,200 Ω at room temperature. Below 500 Ω or open circuit means failure. Don’t skip this you’ll avoid replacing a good sensor.
If resistance checks out, test wiring continuity from the sensor plug to the ECU pin B27 (check factory service manual for exact pinout). A broken wire inside the harness often near the throttle body bracket is a frequent hidden cause.
Replace only if needed. Use OEM or Denso (OEM supplier) part number 89465-06010. Aftermarket sensors vary widely in reliability some fail within months.
Reassemble carefully: torque the sensor mounting bolt to 7.5 N·m. Over-tightening cracks the housing. Reconnect battery, clear codes, then drive for two full drive cycles to confirm readiness monitors pass.

What mistakes do people make diagnosing P1364?

Swapping the crankshaft position sensor first wrong part, wrong location. The crank sensor (P0335) causes no-starts, not intermittent stalling. Also, assuming it’s the timing belt or VVT-i solenoid: those usually trigger different codes like P0011 or P0340. Another mistake is clearing the code without verifying the fix P1364 can take 2–3 drive cycles to reappear if the root issue remains.

How is this different from P1364 on other models?

The same code appears on Acura TL and Toyota Camry but the sensor location, wiring path, and even the diagnostic thresholds differ. For example, the Acura TL uses a different sensor design and has known PCM software quirks, while the Camry’s 2007–2011 models share the 2GR-FE engine but mount the CMP sensor differently. If you’re cross-referencing, always verify year/make/engine before applying steps. You can read more about how P1364 behaves on the Acura TL or compare wiring approaches in the diagnostic guide.

When should you consider professional help?

If live data looks normal but the code returns, or if resistance and wiring tests check out, the issue may be deeper: a failing ECU input circuit or intermittent short in the main harness. That’s rare but possible. Also, if you don’t have access to a factory-level scan tool (like Techstream), interpreting cam/crank correlation data gets difficult. In those cases, a shop with OEM tools saves time over trial-and-error.

Before you begin: gather a 10mm socket, flathead screwdriver, multimeter, and electrical contact cleaner. Keep the old sensor until you confirm the new one fixes the issue some aftermarket units ship defective. And if you’re working on a 2006–2009 IS350, double-check for oil leaks around the valve cover gasket oil dripping onto the sensor connector is a silent contributor.

Next step: Pull the code, check live cam signal, then inspect the connector. That single visual check catches over half of all P1364 cases on the IS350.