Content Source: 2020 RUSH / SWITCHBACK / Pro-S / XCR Owner’s Manual (9929780 R02) > Diagnostic Trouble Codes (DTC) Chapter

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E-VES Diagnostic Trouble Codes (DTCs)

E-VES Diagnostic Trouble Codes (DTCs)
SPN = Suspect Parameter Number / FMI = Failure Mode Indicator
P-CODE SPN FMI Description Likely Cause(s) ECU Response Primary Course of Action
P1400 520324 3 Diagnostic voltage too high Diagnostic line (Pink / Black in harness, Brown on signal converter) short to +12V

Actuator power (Red / Black) removed

ECU will not allow UP state.

Fuel according to actual position

Inspect PWM converter wiring for chaffing / broken wires

Ensure no loose pins in converter connector


Replace signal converter if no wire / connector issues are found




P1401 5 Diagnostic circuit open / grounded Diagnostic line (Pink / Black in harness, Brown on signal converter) open circuit

Command wire (Dark Blue / White) short to GND

Command wire (Dark Blue / White) open

Actuator power (Red / Black) removed





P1402 13 Learn failure Feedback voltage out of range during learn ECU will force to DOWN state and fuel accordingly Ensure battery is sufficient for relearn (maintains 11.5 volts during the entire procedure)

Ensure Signal converter and / or actuator are not disconnected

Ensure EV relay is connected, operational (clicks) and has no damage to terminal wiring

Check for broken EV cable

Perform cable measurement test per service manual

Remove and inspect the valve assembly for causes for too little or too much travel.









P1403 12 Hardware fault Actuator position sensor failed

Voltage too high during EV learn

Replace EV Actuator
P1404 7 Position not achieved Actuator does not reach commanded state

Will also trigger one of the following:
P140A / B / C


Fuel according to actual valve position See actions for P140A / B / C
P1405 2 PWM set missing Command wire (Dark Blue / White) to actuator open circuit

Command wire (Dark Blue / White) short to GND

All valve positions allowed, Fuel according to actual position, When signal is returned, actuator will re-initialize Inspect signal converter wiring for chaffing or broken wires

Ensure no loose pins on converter connector

Replace signal converter if no wire / connector issues are found



P1406 520335 3 Feedback position short to +12V Feedback position (Dark Blue / Yellow on harness, Grey on signal converter) short to +12V

Actuator power (Red / Black) removed

ECU will force to DOWN state and fuel accordingly
P1407 5 Feedback position circuit open / grounded Feedback position (Dark Blue/Yellow on harness, Grey on signal converter) short to GND

Feedback position (Dark Blue/Yellow on harness, Grey on signal converter) open

Actuator power (Red / Black) removed



P1408 10 Abnormal rate of change Actuator achieves valve state too fast or resistance too low

Actuator power (Red / Black) removed

Command wire (Dark Blue / White) short to +12V

Command wire (Dark Blue / White) short to GND





Position forced to last known state, fuel according to last known state Inspect EV cable for damage or loose attachment at valve assembly
P1409 520334 31 Actuator overheat Actuator Circuit board too hot

Internal short circuit

ECU will not allow UP state, Fuel worst case valve UP state Replace EV Actuator
P1410 520337 31 Learn default position Actuator / Signal converter power (Red / Black) removed ECU will not allow UP operation Inspect Signal converter wiring for chaffing or broken wires

Ensure no loose pins on converter connector

Check actuator wiring for broken wires, loose pins on actuator connector

Replace signal converter





P140A 520325 31 Valve OPEN position not achieved Valve UP position voltage out of range Fuel according to actual valve position Measure cable travel length

Verify smooth valve operation by operating the cable by hand through its full travel

Perform EV relearn procedure

Remove E-VES assembly and inspect for heavy carbon build-up and / or damage





P140B 520326 31 Valve MID position not achieved Valve MID position voltage out of range
P140C 520327 31 Valve DOWN position not achieved Valve DOWN position voltage out of range If occasional, this fault is nothing to be concerned about If persistent:
Measure cable travel length

Verify smooth valve operation by operating the cable by hand through its full travel

Perform EV relearn procedure

Remove E-VES assembly and inspect for heavy carbon build-up and / or damage






P140D 520328 5 EV relay circuit open / grounded EV relay supply power line is open ECU will force to DOWN state and fuel accordingly Inspect EV relay for corrosion or loose terminals

Replace EV relay

P140E 3 EV relay short to power EV relay Grey / Yellow wire short to Power

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