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OBD-II Trouble Shooting Got a code reader? Find out what your GM car's Check Engine light is trying to tell you (and then turn Check Engine light off).

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Old 09-27-2009, 03:42 PM   #1
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Default P0706



Transaxle Range Switch (TRS) is part of Park/Neutral Position
(PNP) switch. Inputs from TRS indicate to PCM which position is
selected by gear selector lever. PCM uses this information for
ignition timing, EVAP canister purge, EGR and IAC valve operation.
Combination of 4 TRS input states determine PCM commanded
shift pattern. Input voltage level at PCM is high when TRS is open,
and low when TRS is closed. If PCM detects engine start-up in any gear
other than Park or Neutral, DTC P0706 is set.

You likely won't notice any drivability problems.

  • TRS inputs indicate a gear position other than Park or
    Neutral during start-up.
  • If DTC P0705 is also set, diagnose DTC P0705 before
  • Check for faulty connection at TRS 4-pin and 7-pin
  • Replace TRS.
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