U0399 Jaguar E-pace OBD Code

OBD/2 U0399 error code description and symptoms.

Low Speed Fuel Pump Primary Circuit Malfunction The PCM monitors the low speed fuel pump (LFP) primary circuit output from the PCM.
The test fails if: When the LFP circuit is commanded on (grounded), excessive current draw is detected on the LFP circuit; or when the LFP circuit is commanded off, voltage is not detected on the LFP circuit (the PCM expects to detect VPWR voltage coming through the low speed fuel pump relay coil to the LFP circuit). Open or shorted low fuel pump (LFP) circuit Open VPWR to low speed fuel pump relay Damaged low speed fuel pump relay Damaged PCM An open circuit or short to ground can only be detected with the low speed fuel pump.

Circuit High Input codes like U0399 are mostly caused by defective alternators that develop excessive voltages, although there may be other causes as well, such as short circuits that 'leak' current into a particular system from other, unrelated systems that work on higher voltages. Note that in the case of short circuits that leak power into a control circuit, there is likely to be other, seemingly unrelated trouble codes present along with the code(s) being investigated. Diagnosing a 'high input' code will always involve a thorough testing of the charging system as a first step, followed by measures to isolate the system from all other possible sources of power during resistance, continuity, and reference voltage tests.

U0399 Jaguar E-pace Error Code Repair Process :

The scent may U0399 signal oil or coolant leaking from their normally closed-loop systems, or it may indicate dangerous exhaust gases invading your car's interior. Car and truck exhaust contains toxic gases such U0399, so if the inside of your car knock sensor 1 circuit malfunction (bank 1 or single sensor) as if you were standing behind your car, get out and get it fixed. Fight the urge to take a little nap first. So sleepy. That's the carbon monoxide talking, friends. At least open a window on your way to the shop.

Common Causes of Jaguar E-pace U0399 OBD2 Code

A common cause of code U0399 is the failure of Knock Sensor 1 Circuit Malfunction (Bank 1 or Single Sensor), but there are several other possible causes as well, such as ;

EVAP canister or fuel tank leaks
Faulty Crankshaft Position Sensor (POS)
Erratic camshaft position due to low oil pressure
Oil flow restriction in the oil passages or the variable camshaft timing (VCT) valve body

U0399 is a kind of Network Trouble Code

U-code indicates that engine communication errors and shows lost communication with engine parts.U-Codes are fairly straight forward, given all of the articles and technical publications that have been written regarding these problematic codes. In most cases, it just comes down to identifying the module that isn't communicating with the other modules on the CAN bus line for whatever reason.

U0399 Jaguar E-pace OBD Code

U0399 Jaguar E-pace Error Code Repair Process :

Common Causes of Jaguar E-pace U0399 OBD2 Code

U0399 code for other Jaguar cars