Diagnostic Trouble Code (DTC) Charts - TheDieselStop.com

6.0L Diesel Diagnostic Trouble Code (DTC) DescriptionsDTC Description Possible Causes Diagnostic Aids212 — Engine Oil When the EOP signal • DTC 212 can be set due DTC 212 is set by thePressure Signal Out Of voltage is detected out of to an open signal ground PCM when the EOP signalRange High range high, the PCM will circuit, short to a voltage is greater than 4.9 volts forcause the engine to ignore source on the ICP signal more than 0.35 seconds.the EOP signal and disable circuit, or a defectivethe Engine Warning andProtection System (EWPS).sensor.• When DTC 212 is set theamber ENGINE indicatoris illuminated.215 — Vehicle Speed The PCM performs • DTC 215 is set by the The PCM will not set DTCsSensor Signal Frequency diagnostic checks on the PCM when the PCM for VSS circuit failure forOut Of Range High VSS circuit when the detects a VSS signal vehicles equipped withengine is operating at 0 greater than 4365 Hz. Allison MD (WTEC) andmph. The PCM transmits a2000 series transmissions.voltage signal on the VSSVehicles equipped with MDcircuit and determines iftransmissions onlythe return voltage is out ofdiagnose therange high or low. When acommunication circuitfault condition is detected,(CAN 1) between thethe PCM disables theengine and transmissioncruise control and powermodule.takeoff. If the road speedlimiting option is enabled,the PCM will limit enginerpm for all gears.225 — EOP Sensor When the EOP signal • DTC 225 is set by the KOEO Engine oil pressureSignal In Range Fault voltage is detected out of PCM when the EOP is greater than 15 psi.range high, the PCM will signal voltage is highercause the engine to ignore than expected with thethe EOP signal and disable key ON and the enginethe Engine Warning and OFF.Protection System (EWPS). • DTC 225 can be set dueto a biased circuit or adefective EOP sensor.• When DTC 225 is activethe amber ENGINEindicator is illuminated.(Continued)2004 F650/F750 6.0L Diesel