P0734 — OBD-II trouble code

A generic powertrain OBD-II trouble code. Below are the vehicles and failure patterns where owners report it, drawn from NHTSA complaints.

In ProblemsByVin's analysis of the NHTSA owner-complaint record, owners cite P0734 across 12 vehicle failure patterns. Diagnostic codes in complaints are reported by owners and are unverified — they point to where this code shows up, not a confirmed diagnosis. Open a page below for the full pattern (symptoms, mileage, repair costs owners cite).

Vehicles where owners report P0734 12 patterns

2022 Jeep Grand Cherokee

powertrain — Loss of acceleration/delayed throttle response

2022 RAM 5500

powertrain — K1 and K2 snap ring failure

2017 Ford F-150

powertrain — 10R80 Transmission Unintended Downshift

2016 Chrysler Town and Country

powertrain — Transmission Pump Hydraulic Pressure Loss / Pump Seizure

2016 Ford Focus

electrical — Transmission shudder, harsh shifting, stalling

2014 Chrysler 200

powertrain — Transmission Jerking and Lurching During Shifting

2013 Chrysler 300

powertrain — Hard shifts, slips, flares, and limp mode—transmission W5A580-NAG1-722.6

2011 Chrysler Town and Country

powertrain — Transmission Gear Ratio / Shift Quality Faults

2010 Dodge Journey

powertrain — Rough / Hard / Loud Transmission Shifts

2010 Dodge Journey

cruise control — Transmission downshifts and surges independent of cruise control

2008 Mercury Mariner

powertrain — Transmission failure/loss of drive

2006 Suzuki Forenza

powertrain — Transmission Range Sensor (TRS) Failure

Codes are pulled from what owners wrote in their NHTSA filings — they're allegations, not a shop diagnosis. Always confirm with a live scan. Browse all diagnostic codes →