P1309 on 2000-2011 Ford Ranger — Manufacturer-Specific Code (Ford: Misfire Detection Monitor Not Enabled)
1 vehicles · 1 makes · $250-$4,000 repair
Most Reported On
P1309 is an OBD-II diagnostic trouble code meaning “Manufacturer-Specific Code (Ford: Misfire Detection Monitor Not Enabled).” P1309 is a manufacturer-specific powertrain code, most associated with Ford. It generally indicates the misfire detection monitor was not enabled or able to run, meaning the system that watches for engine misfires could not complete its self-check (often tied to the camshaft/crankshaft profile-correction or ignition input). It does not itself mean the engine is misfiring, but it signals the monitor is unavailable, which can also block emissions readiness. The exact meaning should be confirmed for the specific vehicle. This code is most commonly reported on 2000-2011 Ford Ranger, with repair costs ranging from $250 to $4,000.
Common Causes
Typical Repair Cost
Based on 2 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P1309, 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 P1309 mean?
P1309 stands for "Manufacturer-Specific Code (Ford: Misfire Detection Monitor Not Enabled)." P1309 is a manufacturer-specific powertrain code, most associated with Ford. It generally indicates the misfire detection monitor was not enabled or able to run, meaning the system that watches for engine misfires could not complete its self-check (often tied to the camshaft/crankshaft profile-correction or ignition input). It does not itself mean the engine is misfiring, but it signals the monitor is unavailable, which can also block emissions readiness. The exact meaning should be confirmed for the specific vehicle.
What are the most common causes of P1309?
The most common causes of P1309 are: Camshaft position sensor fault or signal issue, PCM/PIP profile correction not learned, Wiring or connector fault to the CMP/CKP sensors, PCM software or calibration issue, Sensor installed out of synchronization, Intermittent ignition reference signal. The specific cause varies by vehicle.
How much does it cost to fix P1309?
Repair costs for P1309 range from $250 to $4,000, depending on the vehicle and root cause.
Which vehicles are affected by P1309?
Au7o has documented P1309 across 1 vehicle models from 1 manufacturers: Ford.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.