U1112 Volvo 780 OBD Code

OBD/2 U1112 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.

Some systems require that the actuator has an adequate supply of brake fluid. Low brake fluid levels can mimic the symptoms of code U1112, so consult the manual to locate the brake fluid reservoir. Bear in mind that a low fluid level can set code U1112 on some applications, so make sure that on fluid operated systems the fluid level is up to the mark before starting an electrical diagnosis.

U1112 Volvo 780 Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine U1112 light should flash briefly, indicating that the OBD system is ready to scan your vehicle for any malfunctions. After this brief flash, the light should stay off while you drive as long as no problems are detected. If u1112 scp (j1850) invalid or missing data for primary id so, you'll be glad to know that your vehicle is equipped with an early warning system that could save you time, money, and fuel in addition to helping protect the u1112 scp (j1850) invalid or missing data for primary id.

Common Causes of Volvo 780 U1112 OBD2 Code

A common cause of code U1112 is the failure of U1112 SCP (J1850) Invalid or Missing Data for Primary Id, but there are several other possible causes as well, such as ;

EVAP canister or fuel tank leaks
Air fuel ratio (A/F) Sensor 1 Bank 1 harness is open or shorted
Faulty Mass Air Flow (MAF) sensor
Camshaft advance mechanism binding (VCT unit)

U1112 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.

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

About Us | Contact | Privacy

U1112 Volvo 780 OBD Code

U1112 Volvo 780 Error Code Repair Process :

Common Causes of Volvo 780 U1112 OBD2 Code

U1112 code for other Volvo cars