Parts for your 2005 Toyota Corolla-Crank angle sensor

2005 Toyota Corolla crank angle sensor: what it does and how to look after it

The 2005 Toyota Corolla is fitted with a crank angle sensor (Toyota labels it the Crankshaft Position Sensor, CKP). Toyota service information for the 2005 Corolla engines (1ZZ‑FE and 2ZZ‑GE) specifies a CKP sensor and related DTCs P0335–P0339, confirming it’s used on this model. Technical references such as Toyota TIS workshop literature and common repair manuals (e.g., Haynes for 2002–2012 Corolla/Auris) also describe the CKP mounted at the timing chain cover reading a toothed wheel on the crank.

Under the bonnet, the CKP tracks crankshaft speed and angle so the engine control module can fire ignition coils, time fuel injection, sync with the cam sensor for VVT‑i, and monitor for misfire. Lose that signal and the Corolla may crank but not start, or it might stall at idle or when hot. The sensor reads a reluctor (tone) wheel on the crank—typically a 36‑2 pattern—producing a precise waveform the ECU relies on for every spark and injector event.

It’s not a scheduled service item, but it’s smart to give it a once‑over during regular servicing. Under Australian and New Zealand conditions—heat, dust, and long kilometres—check the CKP connector and harness routing near the timing cover and A/C compressor for chafing, oil weep, or heat damage. A light oil film around the sensor body can point to a tired O‑ring. Typical symptoms of trouble include:

• Hard starting or a no‑start after a hot soak
• Intermittent stalling, rough idle, or hesitation
• Tachometer dropping to zero suddenly
• Check Engine Light with P0335–P0339 codes

Quick checks: with a scan tool, watch cranking RPM—if it reads 0, suspect the CKP or its wiring. Inspect the connector pins for corrosion and make sure the harness isn’t stretched. On bench tests, compare sensor resistance/output to spec from the service manual, and ensure the reluctor teeth aren’t damaged.

Replacement is a straightforward driveway job with basic spanners. Disconnect the battery negative, remove any intake ducting for access, unplug the sensor at the timing cover, and remove its single retaining bolt. Wiggle the sensor out, lightly oil the new O‑ring, install, and torque the bolt to about 8 N·m. Reconnect, clear codes, and road‑test. No special relearn is usually required on these Corollas. Choose a genuine Toyota or quality OE‑equivalent (often Denso) sensor—cheap units can play up when hot. Whilst you’re there, tidy the loom clips to keep the plug secure and away from belt splash.

Where is the crank angle sensor on a 2005 Corolla?

It’s mounted in the front timing chain cover, reading a toothed wheel on the crankshaft just behind the crank pulley. Access is from above under the bonnet on most models, though lifting the car can help reach the connector and bolt if space is tight.

What are common symptoms and fault codes for a failing CKP?

Hard starting, random stalling (especially hot), a dead tach when it dies, and the Check Engine Light. Typical codes are P0335 (CKP circuit) through P0339, which indicate issues with the signal or range/performance.

Do the crank and cam sensors need replacing together?

Not usually. Replace the faulty one confirmed by diagnosis. On high‑kilometre cars, it’s sensible to inspect both connectors and wiring, but only swap parts that test out of spec or set repeatable codes.