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Accelerator Pedal or Lever Position Sensor 1 – Data Valid but Above Normal Operational Range – Most Severe Level
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 148 PID: P091 FMI: 0 LAMP: Red SRT: |
Accelerator Pedal or Lever Position Sensor 1 – Data Valid but Above Normal Operational Range – Most Severe Level. A frequency of more than 1500 Hz has been detected at the frequency throttle input to the ECM. |
Severe derate in power output of the engine. Limp home power only. |
 Frequency Throttle Circuit
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Circuit Description
This type of throttle interface is designed to accept a variable frequency signal as the throttle signal. An electronic component generates a square wave logic-level signal in which the frequency of the signal corresponds to a throttle command. The frequency values are established by the calibration in the ECM.
Component Location
Throttle location varies with each OEM. Refer to the OEM troubleshooting and repair manual.
Shop Talk
The frequency throttle can be used in conjunction with a voltage throttle or by itself.
Possible causes:
- Malfunctioning OEM Frequency Throttle
- Shorted signal wire to voltage source.
Refer to Troubleshooting Fault Code t05-148
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