P0335: Crankshaft Position Sensor 'A' Circuit Malfunction
The Crankshaft Position Sensor (CKP) is the primary engine timing input. It tells the computer engine RPM and exact crankshaft angular position. If the signal disappears, the ECM shuts off fuel injectors and ignition coils to prevent engine backfire.
Driveability & Safety Advisory
NO: Vehicle will stall suddenly while driving and frequently will crank but refuse to start (No-Start).
Official Manufacturer TSB Advisories
Factory Condition: CKP sensor internal coil winding expands and loses electrical continuity when hot, causing sudden engine stalling.
Physical Component Location & Service Access
Mounted on the lower engine block near the flywheel/flexplate or behind the front crankshaft damper.
Electrical Specifications & Live PID Benchmarks
Scan Tool Live Data Targets
Digital Multimeter (DMM) Specs
Documented Model-Specific Case Studies
Root Cause: CKP sensor failure after 20 minutes of driving.
Verified Fix: Replace sensor.
Technician Inspection & Testing Workflow
Watch tachometer during cranking: If needle stays glued to 0 RPM, sensor is not sending signals.
Connect scan tool and check Engine RPM PID while cranking.
Replace CKP sensor.
Recommended Diagnostic Tools & Verified Parts
BlueDriver Bluetooth Pro OBDII Scan Tool
Wireless sensor telemetry & enhanced diagnostics (Engine, ABS, Airbag). Delivers verified vehicle repair reports.
Autel AutoLink AL519 / AL319 OBD2 Scanner
Color screen standalone scanner. One-click I/M emissions readiness status, freeze-frame data, live DTC reset.
AstroAI Digital Multimeter 6000 Counts TRMS
Auto-ranging multimeter for measuring sensor pin resistance (ohms), live DC bias voltage, and circuit continuity per OEM specs.
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Cost Breakdown
Tools & Parts Matrix
Diagnostic Questions & Answers
Why did my car stall on the highway and then restart 20 minutes later?
This is classic CKP thermal failure. When the sensor heats up, microscopic wire cracks inside expand and lose contact. Once the engine cools down, the crack contracts and makes contact again.