Damaged, loose or corroded wiring or connector at the injection timing piston position sensor; Faulty injection timing piston position sensor; Contamination or damage on the sensor tip or its mounting, or incorrect sensor fitting; Incorrect or disturbed injection pump or engine timing; Poor power supply or earth to the sensor circuit; Internal fault in the engine control unit.

P1319

Injection Timing Piston Position Sensor Circuit Range Performance.

Mazda
Powertrain
Manufacturer code
Medium severity

How this code is built

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

What it means

On Mazda, P1319 means the engine control unit has found the injection timing piston position sensor circuit to be out of range or performing poorly. The signal used to work out piston position for injection timing did not match what the control unit expected from the other engine speed and position inputs. This code is most often associated with Mazda diesel engines, but the exact sensor layout depends on the model and engine.

Symptoms

Engine warning light on
Hard starting or long cranking
Rough idle or misfiring
Loss of power or poor acceleration
Uneven or noisy combustion
Engine stalling or failing to start

Possible causes

Damaged, loose or corroded wiring or connector at the injection timing piston position sensorlikely
Faulty injection timing piston position sensorlikely
Contamination or damage on the sensor tip or its mounting, or incorrect sensor fittingpossible
Incorrect or disturbed injection pump or engine timingpossible
Poor power supply or earth to the sensor circuitpossible
Internal fault in the engine control unitrare

How to diagnose

Read all stored codes and freeze frame data, noting engine speed, coolant temperature and load when the fault set, and check for other crank or cam position codes.
Inspect the sensor wiring and connector for chafing, heat damage, water ingress, bent pins and corrosion.
Check the sensor is correctly seated and secure, and that its tip and mounting area are clean and undamaged.
With the engine cranking and running, view the engine speed and timing related live data and look for dropouts or implausible readings.
Check the sensor supply, signal and earth circuits for continuity, shorts and voltage drop, following the wiring diagram for the specific model and engine.
Test the sensor against the manufacturer's resistance or signal specification for that engine, using a suitable meter or oscilloscope.
Check injection pump and engine timing against the manufacturer's procedure if the wiring and sensor test fine, as the method varies by engine.
Clear the code after the repair and road test to confirm it does not return.

How to fix

Repair or replace damaged wiring and clean or replace corroded connector terminals.
Replace the injection timing piston position sensor if it fails testing.
Clean the sensor mounting area and refit the sensor correctly, replacing any damaged seal or fixing.
Reset injection pump or engine timing to the manufacturer's specification where it is found to be incorrect.
Restore a good power supply and earth to the sensor circuit.
Diagnose and replace the engine control unit only after all other causes are ruled out and the manufacturer's procedure is followed.

Can I keep driving?

Medium severity

The car may run, but poor timing signals can cause hard starting, stalling and rough running, so get it checked soon. Avoid long journeys or heavy loads, as the fault could leave you stranded.

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