2001 Kia Rio AutomaticFACTORY OEM SERVICE PROCEDURE

DTC P0601: Engine Control Module (ECM) Check Sum Error: Procedure

  1. Check terminal continuity of EMS and ECM B+ fuses (10-amp) in engine compartment fuse box. If either fuse is blown, locate and repair short to ground in appropriate wire, then replace fuse. See Figure . If both fuses are okay, go to next step.
  2. Backprobe and measure voltage between ECM connector B01 terminal No. 7 (Green/White wire) and ground. See Figure . If battery voltage does not exist, repair open in Green/White wire between ECM and ECM fuse in engine compartment fuse/relay box. Figure . If battery voltage exists, go to next step.
  3. Backprobe and measure voltage between ECM connector B01 terminal No. 8 and terminal No. 9 both Red/Yellow wire and ground. If battery voltage does not exist, repair open in Red/Yellow wire between ECM and EMS fuse in engine compartment fuse/relay box. Check connectors for loose, damaged or corroded terminals. If problem exists, repair appropriate wire or connector. If battery voltage exists, temporarily install a known good ECM into vehicle and check for proper operation. If problem is corrected, replace ECM
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.