P1899 code

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

CARADIODOC

MECHANIC
33,881 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

CARADIODOC

MECHANIC
33,881 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

STEVE W.

MECHANIC
13,494 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