P0385 on 2000-2002 Cadillac Eldorado — Crankshaft Position Sensor "B" Circuit Malfunction
1 vehicles · 1 makes · $200-$500 repair
Most Reported On
P0385 is an OBD-II diagnostic trouble code meaning “Crankshaft Position Sensor "B" Circuit Malfunction.” P0385 indicates a fault in the electrical circuit of the secondary ("B") crankshaft position sensor. The engine control module (ECM) has detected a signal from this sensor that is out of range, intermittent, or missing, which can disrupt accurate timing of fuel injection and ignition. This code is most commonly reported on 2000-2002 Cadillac Eldorado, with repair costs ranging from $200 to $500.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P0385, 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 P0385 mean?
P0385 stands for "Crankshaft Position Sensor "B" Circuit Malfunction." P0385 indicates a fault in the electrical circuit of the secondary ("B") crankshaft position sensor. The engine control module (ECM) has detected a signal from this sensor that is out of range, intermittent, or missing, which can disrupt accurate timing of fuel injection and ignition.
What are the most common causes of P0385?
The most common causes of P0385 are: Faulty crankshaft position sensor 'B', Damaged, corroded, or loose sensor wiring/connector, Open or short circuit in the CKP sensor harness, Damaged reluctor/tone ring teeth on the crankshaft, Metal debris on the sensor tip or excessive air gap, Faulty ECM/PCM (less common). The specific cause varies by vehicle.
How much does it cost to fix P0385?
Repair costs for P0385 range from $200 to $500, depending on the vehicle and root cause.
Which vehicles are affected by P0385?
Au7o has documented P0385 across 1 vehicle models from 1 manufacturers: Cadillac.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.