Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2018 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE
Cruise Control System DTCS
CRUISE CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE IDENTIFICATION
| Cancel code | Item | Note |
|---|---|---|
| 11 | Main switch | This code is displayed without operating the CRUISE switch. Ref. to CRUISE CONTROL SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Cancel Code>11 |
| 12 | Stop & Brake switch | This code is displayed without depressing the brake pedal. Ref. to CRUISE CONTROL SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Cancel Code>12 |
| 13 | Clutch switch | This code is displayed without depressing the clutch pedal. Ref. to CRUISE CONTROL SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Cancel Code>13 |
| 14 | Neutral switch | This code is displayed without shifting to neutral position. Ref. to CRUISE CONTROL SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Cancel Code>14 |
| 15 | Cancel switch | This code is displayed without operating the cancel switch. Ref. to CRUISE CONTROL SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Cancel Code>15 |
| 16 | Ignition switch | This code is displayed without operating the ignition switch. Ref. to CRUISE CONTROL SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Cancel Code>16 |
| 21 | Abnormality of switches when Ignition switch on | This code is displayed when the ignition switch is turned to ON without operating the cruise control command switch. Ref. to CRUISE CONTROL SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Cancel Code>21 |
| 22 | Abnormality of change in vehicle speed | Ref. to CRUISE CONTROL SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Cancel Code>22 |
| 24 | Abnormality of switches related to cruise control | This code is displayed with normal operation. Ref. to CRUISE CONTROL SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Cancel Code>24 |
| 31 | Abnormal engine speed Signal | Cruise in 2nd shift position or more. Ref. to CRUISE CONTROL SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Cancel Code>31 |
| 32 | Cruse Control out of Range | This code is displayed, though the vehicle speed is increased to the speed available for cruise set and set operation was performed again. Ref. to CRUISE CONTROL SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Cancel Code>32 |
| 34 | Prohibition of cruise control at continuing big Accel. angle | This code is displayed when driving for a long period of time at higher speed than appropriate cruise set vehicle speed by operating accelerator pedal. In this case, the cruise setting is deactivated. Ref. to CRUISE CONTROL SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Cancel Code>34 |
| 35 | Prohibition of cruise control at vehicle speed F/B malfunction | This code is displayed when driving condition is not suitable for cruise control. Perform cruise set operation again after clearing the possible cause. Ref. to CRUISE CONTROL SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Cancel Code>35 |
| 41 | VDC/TCS Operating | This code is displayed when driving condition is not suitable for cruise control. Perform cruise set operation again after clearing the possible cause. Ref. to CRUISE CONTROL SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Cancel Code>41 |
| 43 | ABS/VDC Failure | Ref. to CRUISE CONTROL SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Cancel Code>43 |
| 44 | Body Integrated unit Failure | Ref. to CRUISE CONTROL SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Cancel Code>44 |
| 45 | Meter Failure | Ref. to CRUISE CONTROL SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Cancel Code>45 |
| 49 | TCM Failure | Ref. to CRUISE CONTROL SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Cancel Code>49 |
| 61 | Stop & Brake switch | Ref. to CRUISE CONTROL SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Cancel Code>61 |
| 62 | Neutral Switch Failure | Ref. to CRUISE CONTROL SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Cancel Code>62 |
| 63 | Abnormality 1 of change in vehicle speed | Ref. to CRUISE CONTROL SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Cancel Code>63 |
| 64 | Engine Sensor Failure 1 | Ref. to CRUISE CONTROL SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Cancel Code>64 |
| 65 | Abnormality 1 of switches related to cruise control | Ref. to CRUISE CONTROL SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Cancel Code>65 |
| 66 | Cruise Control Calculation Error | Ref. to CRUISE CONTROL SYSTEM (DIAGNOSTICS)>Diagnostic Procedure with Cancel Code>66 |
Factory Service Tools
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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.
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