P1634 fault code: what 3 owners reported

P1634 is a manufacturer-specific powertrain code (engine, transmission, fuel and emissions), so its exact definition belongs to the carmaker and is not in the generic OBD-II list. What it meant in practice is below, from 3 complaints owners filed with NHTSA. Updated November 9, 2026.

3owner reports
2car models
0mention a crash
0mention a fire
2014–2015model years

Which cars get code P1634?

Every model whose owners mentioned P1634 in a complaint, most reports first. Each year opens that car's full problem report. Popular models collect more reports because more of them are on the road.

Chrysler 200

2 reports

2015 · 2

Jeep Cherokee

1 report

2014 · 1

Where does P1634 show up?

By brand

Chrysler2
Jeep1

Component the owner filed it under

Power Train3 (100%)
Electrical System2 (66.7%)
Engine1 (33.3%)
Air Bags1 (33.3%)

Is there a recall for P1634?

The others concern the component owners file this code under (Power Train) on the same cars; they may or may not relate to the code. Recall repairs are free; check your VIN at nhtsa.gov/recalls.

Power Train: Driveline: Differential Unit Chrysler (FCA US LLC) is recalling certain 2014-2017 Jeep Cherokee vehicles equipped with a two-speed Power Transfer Unit (PTU). Relative movement in the Power Transfer Unit (PTU) between the differential input splines and the transmission output shaft may cause some input spline teeth to wear off… NHTSA campaign 20V343000 · June 11, 2020 · Affected cars

2014 Jeep Cherokee. Full risk and remedy on each car's report.

Power Train: Automatic Transmission Chrysler (FCA US LLC) is recalling certain 2014 Jeep Cherokee vehicles equipped with 3.2L engines. In the event that a clutch becomes stuck in the transmission, the transmission software may shift the transmission to neutral. NHTSA campaign 19V447000 · June 13, 2019 · Affected cars

2014 Jeep Cherokee. Full risk and remedy on each car's report.

Power Train: Automatic Transmission Chrysler (FCA US LLC) is recalling certain model year 2014-2015 Jeep Cherokee and 2015 Chrysler 200, Jeep Renegade, RAM ProMaster, and 2016 Fiat 500X vehicles equipped with 9-speed automatic transmissions. The transmission sensor clusters may have insufficient crimps in the transmission wire… NHTSA campaign 16V529000 · July 12, 2016 · Affected cars

2015 Chrysler 200, 2014 Jeep Cherokee. Full risk and remedy on each car's report.

Power Train: Automatic Transmission Chrysler (FCA US LLC) is recalling certain model year 2015 Chrysler 200 vehicles manufactured March 9, 2014, to December 15, 2014, and equipped with a 9-speed automatic transmission. The automatic transmission parking pawl may become contaminated or the park rod may become dislodged or broken. This… NHTSA campaign 15V090000 · February 13, 2015 · Affected cars

2015 Chrysler 200. Full risk and remedy on each car's report.

What happened when owners saw P1634?

3 of the 3 reports, spread across the models above, as the owners wrote them. NHTSA removes names and VINs; long reports are trimmed. CarHooq has not verified individual claims.

When going a certain speed car will jerk and shift roughly into next gear, Faulty air bag system shown on dashboard. Car had been struggling to start lately went to Autozone with the check engine light now showing. Diagnostic machine advised Power Train System issues / Antilock brake system issues. Codes: P1634, U0420-00, C2101-17, & C1246-1C Mileage: 111250 upon doing my research these are common issues with this vehicle but yet no recall could be found for my specific vehicles using Vin #

2015 Chrysler 200Power Train, Air BagsNHTSA complaint 11548371 · Oct 5, 2023

DRIVE ABOUT 37689 MILES. INSERTED KEY TO RUN, NOTHING HAPPENED, TURNED IT OFF, TURNED IT BACK TO RUN, IT POWER UP BUT ENGINE LIGHT POP OUT, TRANSMISSION FAILURE, TCM INTERNAL FAILURE CODE P1634. TURNED IT OFF, WAITED FOR HALF HOUR, TURNED IT ON, POWER RUN NORMAL WITH A LOT OF NOISE, ENGINE LIGHT STILL ON. SHIFT IT TO DRIVE AND IT GOES BACKWARD, THEN SHIFT IT TO PARK, CRANKING NOISE UNDER THE CAR. MESSAGED TRANSMISSION SERVICE, PARK BRAKE SERVICE AND ESC DISABLED/OFF. TURNED IT OFF AGAIN. WAITED FOR FEW MINUTES TURNED IT ON, ENGINE LIGHT STILL ON, SHIFT IT DRIVE, PUSH THE PEDAL (GAS) DOESN'T GO, ABOUT 3 SECONDS LATER IT DRIVE NORMALLY. EVERY TIME SHIFT TO DRIVE HAVE TO WAIT FEW SEC TO GO.

2014 Jeep CherokeePower Train, Electrical System, EngineNHTSA complaint 10823397 · Feb 1, 2016

I PURCHASED MY 2015 CHRYSLER C IN 2017. I STARTED HAVING ISSUES WITH THE TRANSMISSION JUMPING EVERY NOW AND THEN. MY CAR IS AT 60K MILES NOW AND I HAVE A SENSOR LIGHT ON TELLING ME SERVICE AWD. I TOOK IT TO HAVE IT DECIDED AND THE READING I GOT BACK WAS P1634 AND P1634 00. THE POWER TRAIN ISSUE HAS BEEN FIXED BEFORE I OWNED IT AND NOW FROM THE SOUNDS OF IT, MAY BE GOING BAD AGAIN. I SMELL A BURNING SMELL FROM TIME TO TIME WHEN DRIVING ON THE HIGHWAY. I'M TRYING TO TAKE MY CAR IN TO GET SERVICED BUT EVERYONE'S TELLING ME NO OPEN RECALL. HOWEVER I KEEP READING ABOUT RECALLS ON CHRYSLER 200 POWER TRANNY. I HAVE LOST SO MUCH MONEY ON THIS CAR IT'S RIDICULOUS! MY DAUGHTER IS A NEW D

2015 Chrysler 200Power Train, Electrical SystemNHTSA complaint 11414106 · Apr 27, 2021

P1634: questions drivers ask

What does code P1634 mean?

P1634 is a manufacturer-specific powertrain code (engine, transmission, fuel and emissions), so its exact definition depends on the carmaker and is not in the generic OBD-II list. 3 owners reported it to NHTSA, most often for the Chrysler 200 (2), Jeep Cherokee (1); their reports describe what happened.

Which cars get code P1634 most often?

In NHTSA owner complaints, P1634 is mentioned most for the Chrysler 200 (2), Jeep Cherokee (1), across 2 models and model years 2014 to 2015. Popular models collect more reports because more of them are on the road.

Is there a recall for code P1634?

No NHTSA recall text names P1634 directly. 4 recalls on the cars that report this code concern the same component owners name most (Power Train); they may or may not relate to the code. Check your VIN at nhtsa.gov/recalls.

What should I do if my car shows P1634?

Write down when the code appeared and what the car did (warning lights, loss of power, noises, speed, weather). Check your VIN for open recalls at nhtsa.gov/recalls, ask a dealer or independent workshop to read the stored freeze-frame data before anyone clears the code, and keep the repair order. If the car loses power in traffic, stop driving it. CarHooq does not diagnose: these are owner reports and official recall notices, not repair advice.

How this page was made

CarHooq read the text of every owner complaint filed with NHTSA for 19 US and European brands (model years 2012 onwards) and picked out the diagnostic trouble codes owners wrote down. This page lists every mention of P1634. Manufacturer codes have no public standard definition, so CarHooq shows only what owners reported. Nothing here is a diagnosis. More answers: the fault code FAQ. Data: NHTSA Office of Defects Investigation (public domain), retrieved November 9, 2026. How CarHooq reports are made.

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