Hellcat won't shift into park. - Dodge Charger Forums
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post #1 of 2 Old 02-12-2017 Thread Starter
hellkittyshan
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Hellcat won't shift into park.

We had a few upgrades (new pulley) and took her for a spin this last weekend. When we got home, I couldn't shift into park and the P light on the shifter blinks. We had the codes checked and it's coming up with P0850. Any ideas? I will be taking her in, but they can't squeeze us in for two weeks.
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post #2 of 2 Old 02-13-2017
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Originally Posted by hellkittyshan View Post
We had a few upgrades (new pulley) and took her for a spin this last weekend. When we got home, I couldn't shift into park and the P light on the shifter blinks. We had the codes checked and it's coming up with P0850. Any ideas? I will be taking her in, but they can't squeeze us in for two weeks.
Here you go:

When is the code detected?
The signal of the park/neutral position (PNP) switch is not changed in the process of engine starting and driving.

Possible symptoms

Engine Light ON (or Service Engine Soon Warning Light)


P0850 Description

The transmission manual shift shaft switch assembly, also known as the Internal Mode Switch (IMS), is a sliding contact switch attached to the manual shift shaft inside the transmission case. The Park/Neutral Position (PNP) Switch is integrated into the IMS and connects to the Transmission Control Module (TCM) lead-frame through a short wire harness. The 5 inputs to the TCM from the transmission manual shift shaft switch assembly indicate the transmission gear selector lever position. This information is used for engine start enable, engine controls as well as determining the transmission shift patterns.

The state of each input is available for display on the scan tool. The five input parameters represented are Signal A, Signal B, Signal C, Signal P (Parity), and Signal N (Park/Neutral Start Signal). Park/Neutral Signal is sent from the Park/Neutral switch directly to the Engine Control Module (ECM) and is used for engine start enable. The Park/Neutral Signal circuit is not connected to the TCM internally; the circuit uses the TCM as a pass-through connector only.

The ECM Park/Neutral diagnostic monitors the Park/Neutral Signal circuit to detect Low voltage when the ECM expects to see High voltage and High voltage when the ECM expects to see Low voltage.

Read more: https://www.autocodes.com/p0850.html

Regards,
Brian
BND Automotive LLC
440-821-9040
www.bndautomotive.com



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