P0335 Toyota 4Runner
Crankshaft Position Sensor A Circuit Malfunction · Powertrain Code · Critical · Repair: Moderate
What is P0335?
The crankshaft position sensor circuit has a malfunction. Engine may crank but not start, or stall intermittently.
When the Toyota 4Runner triggers code P0335 (crankshaft position sensor a circuit malfunction), it typically points to an issue in the powertrain system. This is a critical severity code, so address it promptly to avoid further damage or safety concerns. Below you'll find the most common causes, symptoms, and repair options specific to the Toyota 4Runner.
This repair is rated moderate, meaning some experience and specialty tools required.
Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your Toyota 4Runner.
Common Causes on Toyota 4Runner
- Crankshaft position sensor (CKP) failed — common on high-mileage Toyota engines
- CKP sensor air gap too large from worn reluctor ring teeth
- Damaged CKP wiring from oil contamination (front crank seal leak)
- Corroded CKP connector
Symptoms
- Engine cranks but will not start — no spark or injector pulse
- Intermittent stalling while driving
- Check Engine Light on
- Tachometer may read zero or fluctuate while running
Notes for Toyota 4Runner
On Toyota, the CKP sensor is typically located near the crankshaft pulley — relatively accessible on most engines, 30-60 minutes labor.