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| Detail Views Fastener Torque Specs Cylinder Head Tightening Sequence Intake Manifold Tightening Sequence Firing Order Other Tools OBD I Trouble Codes Decoding your VIN |
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| OBD I Fault Code Detail | |||||||
| Code 46 Power Steering Pressure Switch (PSPS) Circuit |
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| The power steering pressure switch is incorporated as an ECM discrete input signal representing the parasitic load placed on the engine during high power steering demand periods, such as parking. This load may cause the engine to stall under high power steering pump pressure conditions, therefore, the ECM compensates by automatically increasing the engine idle speed via the IAC whenever the switch closes and a low voltage is monitored by the ECM. This low voltage indicates a high pressure within the power steering system resulting from high demand. The ECM turns the current "OFF" to the A/C compressor relay so the A/C clutch is disengaged to further reduce engine load. To set a Code 46, the following conditions must be met: - Closed power steering switch - Vehicle speed is greater than 40 mph - Both conditions existing for a time greater than 15 seconds |
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