P0339: Crankshaft Position Sensor A Circuit Intermittent
3 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 1999-2004 Jeep Grand Cherokee, 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 3 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
This is a powertrain code, so a basic OBD-II reader can read it. These read P0339.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple code reader for engine (P) codes on many compatible OBD-II vehicles. It does not support every vehicle or hybrid/EV application, and it does NOT read body, chassis or network codes; confirm exact-vehicle compatibility before buying.
- Read & clear engine (P) codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth scanner with a companion app that reads beyond the engine module — ABS, SRS and transmission — plus manufacturer-specific codes on many vehicles.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X V3.0 Elite OBD-II Scanner
by LAUNCH
Handheld scanner covering the 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 tablet with all-system coverage and bi-directional control, so you can command a module rather than only read it.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
What you can do yourself, and what needs a shop
Reading the code, clearing it, and watching whether it returns is a driveway job with the right scanner. These steps are not:
- Module programming or software updates — needs the manufacturer software or a J2534 pass-through with a paid subscription.
- Replacing a control module — most are VIN-programmed and immobilizer-registered, so a new one does nothing until it is coded to your car.
- Airbag/SRS component work — a stored fault can deploy a live device.
If the vehicle is still under warranty, check for an open recall or technical service bulletin before buying anything — the repair may already be covered.
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
Vehicles Affected (3)
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 3 vehicle models from 2 manufacturers: Jeep, Toyota.
Sources (7)
- Manual2004 Jeep Grand Cherokee 4.7L Service Manual: P0320 Diagnostic
- Manual2004 Jeep Grand Cherokee 4.7L Service Manual: CKP Sensor Service
- RecallNHTSA 04V-112: 2004 Grand Cherokee 4.0L CKP Recall Population
- 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.