C3578 Buick Lucerne OBD Code

OBD/2 C3578 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.

At this point we are assuming that the fuses and relays are good. You will need to locate the PCM/TCM and the power input signal circuit using your vehicle information source. Unplug the connector from the PCM/TCM, place the ignition switch in the ON position, and probe the appropriate circuit with the positive test lead of the DVOM.

C3578 Buick Lucerne Error Code Repair Process :

If your passenger seat occupant detection circuit short to ground check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system C3578 and engine control unit are in charge of monitoring a bunch of different passenger seat occupant detection circuit short to ground, and if they get a reading that's a little out of whack, up pops the check engine light.

Common Causes of Buick Lucerne C3578 OBD2 Code

A common cause of code C3578 is the failure of Passenger Seat Occupant Detection Circuit Short To Ground, but there are several other possible causes as well, such as ;

EVAP canister or fuel tank leaks
Continuous oil flow to the VCT piston chamber
Insufficient cylinders compression
Fuel Injectors circuit poor electrical connection

C3578 is a kind of Chassis Trouble Code

Diagnosing chassis noises can be one of the most frustrating problems technicians face. Fortunately, manufacturers have engineered noise, vibration and harshness (NVH) diagnostic techniques and equipment to find the source of the noise.

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

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C3578 Buick Lucerne OBD Code

C3578 Buick Lucerne Error Code Repair Process :

Common Causes of Buick Lucerne C3578 OBD2 Code

C3578 code for other Buick cars