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86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

please help!code 51

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Old May 27, 2006 | 02:46 AM
  #1  
bodo4runner's Avatar
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From: Romania
please help!code 51

i have a 89 4runner and the check engine light came on and i checked the code and it showed a code 51.engine-22r-e,efi.
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Old May 27, 2006 | 04:04 AM
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From: Morgan Hill, Ca
Originally Posted by bodo4runner
i have a 89 4runner and the check engine light came on and i checked the code and it showed a code 51.engine-22r-e,efi.
TPS is one possibility.. any symptoms.. idle, power/hesitation etc?
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Old May 27, 2006 | 08:08 AM
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From: San Antonio, Texas
Code 51 (from the 88 FSM)

No "IDL" signal or no "NSW" signal or "A/C" signal to ECU.

Possible causes:
a/c switch
a/c amplifier
TPS (Throttle position sensor)
NSW (neutral start switch - auto tranny)
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Old Jun 17, 2006 | 12:59 PM
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From: Romania
system blinks normally,but when I press the accelerator pedal it appears the code 51.When I turn on A/C idle drops to around 500 rpm.
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