1, 2 and 3 Digit Codes: 115

Scan Tool 115 (MIL 65):

Trouble Code Number
- Scan tool 115
- General scan tool P0551
- MIL 65

Fault Message
- Power Steering Pressure (PSP) Switch Failure

Background
- Data from the PSP switch allows the PCM to compensate for the additional load put on the engine during steering maneuvers that require high steering pump pressure.

Range of Check
- Vehicle speed: 90 km/h (56 mph)

Set Condition
- PSP switch output voltage: High for 30 seconds

Probable Cause
- PSP switch failed
- Wiring harness and connectors failed