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U1026 – All makes

Code : U1026
Marque : All makes
Description : U1026 SCP Invalid or Missing Data for Engine RPM
Possible causes :
– Faulty / intermittent ignition switch connections
– J1850 / SCP Bus wiring intermittently open, shorted to power or ground
– Faulty / intermittent connection at the Powertrain Control Module (PCM)
– Faulty / intermittent connection at the Instrument Panel Cl
Solutions :
– Carry out a Reset via CarDiag
– Choose a better quality fuel
– Check that the tank cap is securely closed
– Check the oil level and add more if it is lower than MAX
– Restart an Automatic diagnostic via CarDiag
– If the fault persists, you can check the “Possible causes” listed above : visually inspect (by yourself (tutorials to come) or by a professional) the wiring harness and the associated connectors, check for damaged components, and look for broken, bent, pushed, or corroded connector pins.

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