P0339 on 1997-2006 Jeep Wrangler (SE, Sport, Sahara, Rubicon, X) — Crankshaft Position Sensor A Circuit Intermittent
1 vehicles · 1 makes · $60-$250 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 1997-2006 Jeep Wrangler (SE, Sport, Sahara, Rubicon, X), with repair costs ranging from $60 to $250.
Common Causes
Typical Repair Cost
Based on 1 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
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
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 $250, depending on the vehicle and root cause.
Which vehicles are affected by P0339?
Au7o has documented P0339 across 1 vehicle models from 1 manufacturers: Jeep.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.