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P1899 code

Tiny
ANTHONYCOHEN
  • MEMBER
  • 1999 JEEP CHEROKEE
  • 4.0L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 230,000 MILES
Had a P1899 and replaced the switch along with repairing wiring at the switch. P1899 stays off for a day but returns the next day after start up. Do you have any suggestions? The NSS is a typical screw in style and works correctly.
Tuesday, December 27th, 2016 AT 2:16 PM

3 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 33,727 POSTS
P1899 - Park/neutral position switch stuck in park or in gear.

Please elaborate on "works correctly"? I do not know what or how you tested it, or what the results were. Why did the wiring need to be repaired?
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Tuesday, December 27th, 2016 AT 3:14 PM
Tiny
CARADIODOC
  • MECHANIC
  • 33,727 POSTS
Also, there are two different transmissions and they use different neutral safety systems. Do you have the older three-terminal neutral safety switch, or the newer "transmission range sensor"? The sensor has a wire harness with an eight-terminal connector.
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Tuesday, December 27th, 2016 AT 3:18 PM
Tiny
STEVE W.
  • MECHANIC
  • 12,950 POSTS
Check along the wiring harness where it goes up along the trans and firewall, it is common for them to rub through the insulation and send a false signal.
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Tuesday, December 27th, 2016 AT 7:26 PM

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