Ram 1500 P0335 — Crankshaft Position Sensor Circuit

Ram-specific code — factory diagnostic data

Last updated: May 14, 2026

Definition source: Ram factory description. Diagnostic guidance is based on factory-defined fault logic for this code.

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↗Looking for the cross-vehicle definition? Read the generic P0335 article for the SAE-defined fault logic that applies to all manufacturers.

P0335 Quick Answer

P0335 on a Ram 1500 means the PCM detected a fault in the crankshaft position sensor circuit — no signal, intermittent signal, or out-of-range signal. On Hemi-equipped Rams the CKP sensor itself is the dominant cause; on Pentastar V6 Rams a chafed wire near the sensor is more common. Either way, the truck may exhibit hard-start, no-start, or random stalling.

What Does P0335 Mean on a Ram 1500?

The Ram 1500 (2009-2024) stores P0335 when the condition described above is met. This guide focuses on the 5.7L V8 HEMI / 3.6L V6 Pentastar — the most common Ram 1500 powertrain. The platform-specific failure patterns documented below differ from the generic SAE definition.

Symptoms

• Hard start / extended cranking
• No-start condition (intermittent or permanent)
• Random stalling, especially after warm-up
• Check Engine Light (P0335)
• Tachometer dropping to zero while driving
• Possible “no spark / no fuel” condition during a no-start

Common Causes (Most Likely on This Model First)

1. Failed CKP sensor. Hemi sensors fail after 100k-150k miles. Often intermittent at first — truck stalls then restarts after sitting. Once the failure becomes permanent, no-start condition.
2. Chafed wiring at the CKP harness (more common on 3.6L Pentastar). The sensor mounts at the back of the engine — heat and proximity to the exhaust can chafe insulation over time. Inspect carefully.
3. Damaged reluctor wheel (rare). The toothed wheel on the crankshaft that the sensor reads. Damage from a previous repair or oil pump failure debris.
4. PCM connector / pin issue. Less common but worth inspecting. Backed-out pin or moisture damage.
5. Loose sensor. Air gap matters — a loose mounting bolt lets the sensor sit too far from the reluctor.

Diagnostic Approach

1. Read freeze frame — was the fault active at hot or cold? Hot-only often indicates heat-related insulation breakdown.
2. Visually inspect the CKP sensor harness for chafe, especially near the exhaust.
3. Measure sensor resistance (varies by year, typically 100-300Ω for Hemi). Open or short = sensor bad.
4. On scope: crank the engine and watch for a clean square-wave pattern on the CKP signal. Missing pulses = sensor or reluctor problem.
5. Inspect the reluctor wheel through the sensor hole (with sensor removed) for damage.
6. Check the sensor mounting bolt is tight and air gap is to spec.

Possible Fixes

Can I Still Drive With P0335?

Marginal. If the truck currently runs without stalling, drive directly to a shop. If it’s stalling intermittently or won’t restart after stalling, get it towed — being stranded is a real possibility.

How Serious Is This Code?

Moderate to high. A failed CKP can leave you stranded. Address quickly.

Repair Costs