What are the possible causes of DTC P1314 Jaguar?
NOTE: The causes listed may not be a complete list of all potential problems and there may be other causes.
- Low cylinder compression
- Low fuel pressure
- Clogged fuel injectors
- Faulty/worn spark plugs
- Faulty ignition coil
- Faulty fuel injectors
- Faulty Engine Control Module (ECM)
P1314 Jaguar Technical Notes
Diagnostic Test Procedure
Solution:
Turn off the engine.
Disconnect the injector and coil pack multi-plugs and proceed to step 1 of the test below.
Test:
•1. Ensure that injector harness pin 1 continuity is correctly wired to PI 119/005. If the result is positive, proceed to step 2. If the circuit is open, locate and correct the wiring fault, reconnect the harness and proceed to step 13.
•2. Ensure that the harness continuity of each injector pin 2 is correctly wired to the GEMS ECM connection. If the result is positive, proceed to step 3. If the circuit is open, locate and correct the wiring fault, reconnect the harness and proceed to step 13.
•3. Ensure that the harness continuity of each coil pin 1 is correctly wired to the GEMS ECM connection. If the result is positive, proceed to step 4. If the circuit is open, locate and correct the wiring fault, reconnect the harness and proceed to step 13.
•4. Ensure that the harness continuity of each coil pin 1 is correctly wired to RS 001/010. If the result is positive, proceed to step 5. If the circuit is open, locate and correct the wiring fault, reconnect the harness and proceed to step 13.
•5. Ensure that the harness insulation of each injector pin 1 is correctly grounded. If this gives a positive result, proceed to step 6. If there is a short circuit, locate and correct the wiring fault, reconnect the harness and proceed to step 13.
•6. Ensure that the harness insulation of each injector pin 2 is correctly grounded. If the result is positive, proceed to step 7. If there is a short circuit, locate and correct the wiring fault, reconnect the harness and proceed to step 13.
•7. Ensure that the harness insulation of each coil pin 1 is correctly grounded. If the result is positive, proceed to step 8. If there is a short circuit, locate and correct the wiring fault, reconnect the harness and proceed to step 13.
•8. Ensure that the harness insulation of each coil pin 2 is correctly grounded. If the result is positive, proceed to step 9. If there is a short circuit, locate and correct the wiring fault, reconnect the harness and proceed to step 13.
•9. Check the voltage reading between each injector pin 2 connector and PI 119/005. If it reads 0 V, proceed to step 10. If it reads Vbatt, locate and correct the wiring fault, reconnect the harness and proceed to step 13.
•10. Check the voltage reading of each injector pin 1 connector and PI 119/005. If it reads 0 V, reconnect the harness and proceed to step 11. If the reading is Vbatt, locate and correct the wiring fault, reconnect the harness, reconnect the injector, coil and harness and proceed to step 13.
•11. Ensure that the fuel pump pressure is between 3 and 4 bar (absolute) and that it changes according to engine load. If this gives a positive result, proceed to step 12. If the pressure is out of range, correct it and proceed to step 13.
•12. Check if the crankshaft position sensor fault code has been recorded. If not, proceed to step 13. If it is faulty, correct it and proceed to step 13.
•13. Clear the fault. Then, in order to verify if the error code has been cleared, perform the service drive cycle. If this gives a positive result, stop. If the fault persists then proceed to step 14.
•14. Repeat the diagnostic procedure. If it now omits a positive result, stop. Is your Jaguar subject to
How to fix DTC P1314 Jaguar?
Check the “Possible Causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
What are the possible symptoms of Jaguar code P1314?
- Check Engine Light on (or Engine Maintenance Warning Light soon)
What does Jaguar code P1314 mean?
The Engine Control Module (ECM) monitors the engine for misfires. The Diagnostic Trouble Code (DTC) will be set if the Engine Control Module detects a misfire severe enough to cause excessive exhaust emissions and damage the catalytic converter. If a misfire occurs, codes P1314 and P1316 will be set.