C1603 Trouble Code

View C1603 obd/2 error code description and symptoms. C1603 engine photo

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.

Difficulty Level (Easy)
Level
Repair Time (20 Min.)
Time
Cost Prediction : $ 40-75

C1603 Error Code Repair Process :

If your scp (j1850) invalid or missing data for function read engine torque 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 C1603 and engine control unit are in charge of monitoring a bunch of different scp (j1850) invalid or missing data for function read engine torque, and if they get a reading that's a little out of whack, up pops the check engine light.

Wrench Tool C1603 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.

Common Causes of C1603

A common cause of code C1603 is the failure of SCP (J1850) Invalid or Missing Data for Function Read Engine Torque, but there are several other possible causes as well, such as ;

C1603 code for all cars

You can view according C1603 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+C1603 Mercedes Clk 270 +C1603 Ac 10 +C1603 Lancia Megagamma +C1603 Pontiac Fiero +C1603 Volkswagen Jetta A4

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