P1309 on Ford
Manufacturer-Specific Code (Ford: Misfire Detection Monitor Not Enabled)
P1309 on Ford vehicles indicates manufacturer-specific code (ford: misfire detection monitor not enabled). Au7o has documented this code across 1 Ford model — most commonly on Ranger. 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. Typical repair costs on Ford range from $250 to $4,000, depending on the specific model and root cause.
Common Causes of P1309
- •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
P1309 on Ford by Model
Ford Ranger(2 issues)
- Camshaft Synchronizer Chirp and Oil Pump Drive Failure on 3.0L/4.0L V62000-2011
A well-documented issue on late OHV/4.0L Ranger engines is wear of the camshaft synchronizer assembly, which drives the oil pump and provides the cam position signal. Owners commonly report a squeaking or chirping noise from the rear of the engine that is often mistaken for a belt or idler pulley. If ignored, the synchronizer can seize or wear enough to damage the cam sensor and in some cases affect oil pump drive reliability, causing stalling, misfires, or no-start conditions.
- Timing Chain Guide and Cassette Failure on 4.0L SOHC V62001-2011
The 4.0L SOHC V6 is widely known for timing chain guide and cassette wear, especially the rear cassette that is difficult to access. Owners report startup rattle, chain noise at idle, and eventually severe timing errors or engine damage if the plastic guides break apart. Because one chain assembly is at the rear of the engine, repair labor is high and many trucks end up needing engine removal or replacement.
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View P1309 across all makes →Frequently Asked Questions
What does P1309 mean on Ford?▼
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. On Ford specifically, this code is documented across 1 model.
What causes P1309 on Ford vehicles?▼
Common causes on Ford: 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. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P1309 on a Ford?▼
Repair costs on Ford range from $250 to $4,000, depending on the specific model and root cause.
Which Ford models have P1309 documented?▼
Au7o has documented P1309 on 1 Ford model: Ranger.