P0339: Crankshaft Position Sensor A Circuit Intermittent
2 vehicles · 2 makes · $60-$350 repair
Most Reported On
P0339 is an OBD-II diagnostic trouble code meaning “Crankshaft Position Sensor A Circuit Intermittent.” The crankshaft position (CKP) sensor 'A' signal is intermittent, dropping in and out. The controller intermittently loses the crank reference, typically causing random stalls or no-restart events that are hard to reproduce. Often a loose connector, marginal sensor, or chafed wire. This code is most commonly reported on 2000-2010 Toyota Corolla, and 1997-2006 Jeep Wrangler (SE, Sport, Sahara, Rubicon, X), with repair costs ranging from $60 to $350.
Common Causes
Typical Repair Cost
Based on 2 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P0339, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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FAQ
What does P0339 mean?
P0339 stands for "Crankshaft Position Sensor A Circuit Intermittent." The crankshaft position (CKP) sensor 'A' signal is intermittent, dropping in and out. The controller intermittently loses the crank reference, typically causing random stalls or no-restart events that are hard to reproduce. Often a loose connector, marginal sensor, or chafed wire.
What are the most common causes of P0339?
The most common causes of P0339 are: Intermittent wiring or loose/corroded connector, Heat-sensitive or marginal CKP sensor, Variable air gap from a loose sensor, Damaged/chafed harness, Reluctor ring runout. The specific cause varies by vehicle.
How much does it cost to fix P0339?
Repair costs for P0339 range from $60 to $350, depending on the vehicle and root cause.
Which vehicles are affected by P0339?
Au7o has documented P0339 across 2 vehicle models from 2 manufacturers: Jeep, Toyota.
Sources (4)
- articleToyota Corolla Crankshaft Position Sensor Guide (1995-2010) - Go-Parts
- ForumP0335: Crankshaft Position Sensor A Circuit Malfunction - Toyota Nation
- articleJeep Wrangler TJ (1997-2005) Engine Crankshaft Position Sensor Guide — Go-Parts.com
- ForumWon't start. Crank Position Sensor issue? — Jeep Enthusiast Forums
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.