Power Solutions International

DTC 221

UnclassifiedEmissions

What This Code Means

TPS 1 Higher Than TPS 2; TPS1 and TPS2 difference is more than the fault condition defined in the calibration

Possible Causes

  • •Faulty ECM
  • •Intermittent problem
  • •TPS shorted to voltage in the harness
  • •Faulty connection at throttle
  • •Faulty throttle

Suggested Actions

  1. 1Perform the On-Board (OBD) System Check.
  2. 2With Key ON, Engine OFF, System Mode set to 'Stopped', and 'DBW Test' mode enabled, slowly depress FPP sensor (or for stationary applications, go to DBW page and type desired throttle opening % in the TPS Command box) to check if TPS1 and TPS2 difference is more than the fault condition.
  3. 3Turn Key OFF, disconnect throttle from harness, turn Key ON, Engine OFF, set System Mode to 'Stopped', enable 'DBW Test' mode, and check if voltage for both TPS1 and TPS2 is less than 0.100 VDC.
  4. 4Connect TPS1 signal to the 5V reference at throttle connector while observing TPS1 voltage, repeat for TPS2, and check if DST displays both TPS1 and TPS2 voltage over 4.90 VDC when each is connected to 5Vref.

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DTC 1153DTC 108DTC 1113301163221DTC 222DTC 223DTC 219DTC 234DTC 217DTC 236
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