Parts for your 2011 Toyota Mark x-Crank angle sensor

2011 Toyota Mark X Crank Angle Sensor

Based on Toyota technical literature, the 2011 Toyota Mark X (GRX130/133, 4GR‑FSE 2.5L and 2GR‑FSE 3.5L) is equipped with a crank angle sensor, formally called the Crankshaft Position Sensor (CKP). Toyota’s New Car Features (NCF) for the GR-series engines, the Repair Manual sections covering SFI/Engine Control, and the Electrical Wiring Diagram (EWD) all show a CKP sensor that reads a toothed timing wheel on the crankshaft to inform the engine ECU of exact crank angle and speed.

On a 2011 Mark X, the crank angle sensor is a small but critical bit of kit. Its job is to report the crank’s position and rpm to the ECU so the car can time fuel injection and spark bang-on. With dual VVT-i and direct injection on the GR engines, accurate crank info keeps starts clean, idle smooth, and power delivery crisp. If the sensor signal goes walkabout, the ECU can’t sync fuel and spark properly, leading to rough running or no start.

It’s not a routine service item, but it’s smart to give it a look whenever the front undercovers are off or when chasing drivability gremlins. A good tech will check for oil intrusion at the connector, harness chafe, and metal fuzz on the sensor tip. Because the sensor reads a reluctor wheel, any debris or damage can muck up the signal. Genuine or quality aftermarket replacements are inexpensive insurance when faults show up.

• Common signs it’s unhappy: hard starting or stalling once warm, random misfires, a dead tach during crank, and engine light with codes like P0335.
• Basic checks: scan data for engine rpm while cranking, inspect the 3‑pin connector and wiring, verify battery health, and look for interference from aftermarket alarms or remote starts.

Replacement is straightforward for a competent technician: disconnect the battery, reach the sensor at the block (location varies slightly by 4GR vs 2GR), unclip the connector, swap the sensor and O‑ring, and torque to spec from the factory manual. After refit, clear codes and confirm clean crank and idle. There’s no set kilometre interval—many last the life of the vehicle—but at higher mileage or if the loom’s been heat-soaked, pre‑emptive replacement during major engine work isn’t a bad shout. Kept clean, dry, and properly seated, the Mark X’s crank angle sensor will quietly keep the timing sharp for years.

• Where is the crank angle sensor on a 2011 Mark X?
  On GR-series V6 engines it’s mounted to the engine block to read a reluctor on the crankshaft. Access is typically from underneath with the engine undercovers off. Exact spot can differ slightly between 4GR‑FSE and 2GR‑FSE, so a workshop manual or a quick visual under the bonnet helps pinpoint it.
• What are the usual fault codes and symptoms?
  The big one is P0335 (Crankshaft Position Sensor “A” Circuit), sometimes paired with P0339 (intermittent). Symptoms include long crank, no start, sudden stall, rough idle, and the tacho not moving while cranking. It can also trigger misfire codes because the ECU loses sync.
• Does it need regular replacement?
  No scheduled interval. Many run well past 200,000 km. Replace when there are confirmed faults, damage, contamination, or if the harness has been heat-baked. During major services or timing/drive work, a quick inspection and connector clean is good practice.