Crankshaft and camshaft sensor connectors swapped or plugged into the wrong sockets after earlier work; Damaged, chafed or corroded wiring or connectors between the sensors and the control unit, including crossed or shorted signal wires; Camshaft timing out of position because of a jumped or incorrectly fitted timing belt or chain; Faulty crankshaft or camshaft position sensor giving a distorted or weak signal; Damaged or incorrectly fitted reluctor or trigger wheel on the crankshaft or camshaft; Fault inside the engine control unit.

P1339

Crankshaft Position Engine Speed Sensor Cross Connected.

Volkswagen
Powertrain
Manufacturer code
High severity

How this code is built

P: SystemPowertrain
1: Defined byThe manufacturer
3: AreaIgnition system or misfire
39: FaultThe specific fault in that area

What it means

P1339 on a Volkswagen means the engine control unit has detected that the crankshaft position (engine speed) sensor signal and the camshaft position sensor signal do not correlate as expected, which is reported as the signals being cross connected. The control unit compares the timing of the crank and cam signals and sets the code when the relationship is wrong. The cause can depend on the engine and model, so check the wiring layout for the specific vehicle.

Symptoms

Engine management light on
Engine cranks but is hard to start or will not start
Rough running or misfires
Poor power or the car going into limp mode
Intermittent stalling

Possible causes

Crankshaft and camshaft sensor connectors swapped or plugged into the wrong sockets after earlier worklikely
Damaged, chafed or corroded wiring or connectors between the sensors and the control unit, including crossed or shorted signal wireslikely
Camshaft timing out of position because of a jumped or incorrectly fitted timing belt or chainpossible
Faulty crankshaft or camshaft position sensor giving a distorted or weak signalpossible
Damaged or incorrectly fitted reluctor or trigger wheel on the crankshaft or camshaftrare
Fault inside the engine control unitrare

How to diagnose

Read all stored fault codes and freeze frame data, noting any related crank, cam or misfire codes, then record them before clearing anything
Check whether recent work was carried out on the engine, such as sensor, timing belt or harness replacement
Inspect both sensor connectors and the surrounding harness for correct fitment, damage, oil contamination, corrosion and chafing
Confirm each connector is plugged into the correct sensor and compare the wiring against the wiring diagram for the specific model and engine
Check live data for engine speed while cranking and compare crank and cam signal presence and behaviour
Test the wiring for continuity, shorts to each other, to earth and to supply, following the manufacturer procedure
Inspect the sensors and trigger wheels for damage, debris or incorrect fitment
Verify the valve timing against the manufacturer timing marks, where the engine design requires it

How to fix

Reconnect the sensor plugs to the correct sensors and secure the connectors
Repair or replace damaged wiring and connectors, restoring the correct pin-to-pin routing
Reset the valve timing correctly and replace any damaged timing components
Replace a faulty crankshaft or camshaft position sensor
Replace or correctly refit a damaged trigger wheel
Replace or have the engine control unit checked only after wiring, sensors and timing are proven good

Can I keep driving?

High severity

Avoid driving the car until the cause is found, as incorrect timing or a failing signal can cause stalling and, in the worst case, engine damage. If it still runs normally and the fault is intermittent, limit driving to getting it to a workshop.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.