Before you go any further, put the 2 wires you swapped back where they were in the C1 ECM plug. See if any of the codes come back.
Above 2006 KJ Codes "Generally" explained for others looking... These are not KK codes! U0121 = Lost communication with anti-lock brake system (abs) control module. Possible causes; Can C bus circuits open or shorted, DTCS related to battery voltage, ignition, or VIN messages, Anti-lock brake module, Anti-lock brake module power and ground, Module that set this DTC.
P0530 = AC pressure sensor malfunction plausibility - circuit malfunction. Possible causes; 5-volt supply circuit open, BCM - a/c pressure sensor signal circuit shorted to voltage, BCM - a/c pressure sensor signal short to ground, A/C pressure sensor failure, A/C pressure sensor signal circuit open, A/C pressure sensor signal circuit shorted to ground, A/C pressure sensor signal circuit shorted to sensor ground, A/C pressure sensor signal circuit shorted to voltage, Sensor ground circuit open, Intermittent condition.
P1001 = Ignition key off timer performance - too fast. Possible causes; BCM, BCM power and grounds, Checking for other DTCs, Checking ECT operation, Ignition switch, Intermittent condition.
P0884 = Power up at speed (42RLE). Possible Causes; Intermittent power and ground circuits. P0884 = Power up at speed (Diesel 545RFE), Possible Causes; Intermittent power and ground circuits, A rolling restart maneuver.
P1684 = Battery was disconnected (42RLE) Possible Causes; Battery was disconnected, PCM was replaced or disconnected, Quick learn was performed, (A919) Fused b+ circuit to PCM open, (Z908 and Z977) Ground circuit open. OR P1684 = Battery was disconnected (Diesel 545RFE) Possible Causes; Battery was disconnected, Scan tool battery disconnect performed, TCM was replaced or disconnected, Quick learn was performed.
U0002 = Can C bus off performance. Possible Causes; A module detects a short in either CAN C Bus circuit. This code can set other DTCs.
U0100 = ABS; Lost communication with ECM/PCM. Possible Causes; DTCs related to battery voltage, ignition, or VIN messages., CAN C bus circuits open or shorted, ECM or PCM power and ground, ECM or PCM, Anti-lock brakes module. OR U0100 = Lost communication with ECM/PCM. Possible Causes; CAN C bus circuits open or shorted, DTCs related to battery voltage, ignition, or VIN messages, ECM/PCM, ECM/PCM power and ground, Module that set this DTC( ie 42RLE module, ABS module...)
U0401 = ABS; Implausible data received from ECM/PCM. Possible Causes; ABM CAN BUS DTCs, ENGINE DTCs, Anti-lock brake module.
U140E = ABS; Implausible vehicle configuration data received. Possible Causes; Wiring harness, terminal, connector damage., DTCs related to battery voltage, ignition, or VIN messages, CAN C bus circuits open or shorted, ECM OR PCM DTCs present, ECM OR PCM not programmed or programmed with incorrect VIN, BCM not programmed or programmed with incorrect information, ECM, PCM or BCM, Anti-lock brakes module.
C2202 = ABS; Original VIN mismatch/missing. Possible Causes; Anti-lock brake module. When it fails the diagnostic test.
_________________ 07 KA Light Khaki, Manual trany. 2.5" Adjust-A-Strut JBA lift, Euro taillights, Home made; Front Tilt Hood, Roof Rack, RAM Air, & CAI. ESP Off Switch Take a ride on the Trō side!
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