P0346: Camshaft Position Sensor A Circuit Range/Performance (Bank 2)
2 vehicles · 2 makes · $250-$4,500 repair
Most Reported On
P0346 is an OBD-II diagnostic trouble code meaning “Camshaft Position Sensor A Circuit Range/Performance (Bank 2).” The camshaft position (CMP) sensor 'A' signal on bank 2 is present but out of range or not correlating with the crankshaft (range/performance). Often from timing-chain stretch on bank 2, a damaged reluctor, or air-gap/wiring noise. This code is most commonly reported on 2004-2014 Ford Expedition, and 2006-2016 Mercedes-Benz E-Class (E350, E550, E400), with repair costs ranging from $250 to $4,500.
Common Causes
Typical Repair Cost
Based on 2 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 P0346.
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.
FAQ
What does P0346 mean?
P0346 stands for "Camshaft Position Sensor A Circuit Range/Performance (Bank 2)." The camshaft position (CMP) sensor 'A' signal on bank 2 is present but out of range or not correlating with the crankshaft (range/performance). Often from timing-chain stretch on bank 2, a damaged reluctor, or air-gap/wiring noise.
What are the most common causes of P0346?
The most common causes of P0346 are: Stretched/worn timing chain on bank 2, Damaged cam reluctor/timing wheel, Degrading bank 2 CMP sensor, Air-gap or loose sensor, Intermittent wiring/electrical interference. The specific cause varies by vehicle.
How much does it cost to fix P0346?
Repair costs for P0346 range from $250 to $4,500, depending on the vehicle and root cause.
Which vehicles are affected by P0346?
Au7o has documented P0346 across 2 vehicle models from 2 manufacturers: Ford, Mercedes-Benz.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.