P0751 on Chrysler: How to Diagnose & Fix
Shift Solenoid A Performance/Stuck Off
5 Chrysler models · 5 documented issues · 4 critical · $5-$8,000 repair
P0751 on Chrysler by model: symptoms, diagnosis and fix
The 42LE 4-speed automatic transmission in the 300M is prone to premature failure, including solenoid pack issues, torque converter clutch failure, and internal clutch pack wear. The high torque output of the 3.5L V6 stresses the transmission beyond its design limits. Harsh shifting, slipping, and limp mode are common symptoms. The transmission is shared with the Intrepid, Concorde, and LHS, and the failure patterns are identical across all platforms. The solenoid pack and connector are the most common failure points.
Common Symptoms
- Harsh or delayed shifting
- Transmission slipping under hard acceleration
- Stuck in 2nd gear limp mode
- Shudder during torque converter lockup at highway speed
- Check engine light with transmission codes
How to Fix
Sources for this issue (1)
A small plastic clip in the shifter mechanism breaks, causing the vehicle to become stuck in Park. Known design flaw in the first-generation LX platform vehicles. The clip is inexpensive but causes a completely disabled vehicle when it fails. Emergency brake override button near shifter can bypass the issue temporarily.
Common Symptoms
- Vehicle stuck in Park, unable to shift
- Shifter feels loose or has excessive play
- Intermittent difficulty shifting from Park
- Clicking sound when trying to shift out of Park
How to Fix
Replace broken shifter clip (Mopar 4578446AA). Accessible by removing center console trim. Keep a spare clip in the glove box. Know the location of the brake override release near the shifter for emergency bypass.
Sources for this issue (1)
The 42LE 4-speed automatic transmission in the LHS shares the same failure patterns as the Intrepid, Concorde, and 300M. Solenoid pack failures, torque converter clutch issues, and internal clutch pack wear lead to harsh shifting, slipping, and limp mode. The LHS's heavy curb weight and 3.5L V6 torque output stress the transmission. The solenoid pack and transmission connector are the most common failure points and can be serviced without removing the transmission.
Common Symptoms
- Harsh or delayed gear shifts
- Transmission slipping
- Stuck in limp mode (2nd gear only)
- Shudder at highway speed during TCC lockup
- Check engine light with P0700 series codes
How to Fix
Sources for this issue (1)
Internal transmission wiring connectors in PHEV models can short circuit, causing unexpected engine shutdown while driving. The low-voltage wiring harness within the transmission develops shorts, causing the gas engine to shut down and the vehicle to go into limp mode or lose motive power entirely. Recall 03A / NHTSA 23V010 issued.
Common Symptoms
- Engine suddenly shuts off while driving
- Service Transmission warning message
- Vehicle goes into limp mode
- Loss of power while driving
- Transmission stuck in one gear
How to Fix
Contact dealer for Recall 03A / NHTSA 23V010 inspection. Dealers will inspect and if necessary replace the entire transmission. Keep gas tank above quarter-full so gas engine can take over if electric system fails.
Sources for this issue (1)
The rear-mounted 42LE (A606) automatic can drop into limp-in (fail-safe) mode when the electronic shift solenoid pack develops internal faults. Symptoms are the transmission locking into a single gear (commonly 2nd, or only 1st and reverse) until the ignition is cycled, often accompanied by a check-engine/transmission light. This is distinct from the fluid-overheating and AutoStick harsh-shift issues: here the solenoid pack itself (or its wiring/connector) is the root cause and typically sets solenoid-performance codes.
Common Symptoms
- Transmission stuck in one gear (limp mode)
- Only 1st and reverse available after warm-up
- Harsh or no upshift with warning light
- Fault clears after ignition off/on
- No torque-converter lockup
How to Fix
Scan for codes and confirm with pressure/solenoid tests before parts replacement. Replace the shift solenoid pack (reman Mopar A606/42LE solenoid pack, PN 4539766) along with a fresh filter and correct ATF; cycling the ignition off/on temporarily clears limp mode as a get-home measure. Verify the transmission connector and internal wiring harness are not the fault before condemning the pack.
What you need to diagnose it
The repair instructions explicitly call for reading stored codes. Use a scanner that can read the named code families before choosing a repair.The recommended scanner supports these code families; confirm your exact year, model and module coverage before buying.
ANCEL AD310 Classic OBD-II Scanner
Read & clear engine (P) codes
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Reading and clearing the code is DIY work. Module replacement or reprogramming is not — most modules are VIN-programmed, so a new one does nothing until a shop codes it to your car. Check for an open recall or service bulletin before buying anything.
Sources for this issue (1)
P0751 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0751 mean on a Chrysler?
P0751 stands for "Shift Solenoid A Performance/Stuck Off." This code means the transmission control module commanded Shift Solenoid A (sometimes called Shift Solenoid 1) but the transmission did not respond properly, with the solenoid acting as though it is stuck 'off.' Shift solenoids are electrically operated valves that direct hydraulic fluid pressure to engage gears, so when one underperforms the transmission may shift harshly, slip, or fail to change gears at the right time. The computer sets this code when the measured gear ratio or shift behavior does not match the commanded state. It generally indicates a hydraulic or performance issue with the solenoid or the fluid circuit it controls inside the automatic transmission. On Chrysler it is documented across 5 models: 300M, 300, LHS, Pacifica, Prowler.
What are the most common causes of P0751?
The most common causes of P0751 are: Stuck or failed Shift Solenoid A, Low, dirty, or degraded transmission fluid, Clogged solenoid screen or valve body passages, Sticking or worn valve body components, Wiring or connector problem at the solenoid, Internal transmission mechanical wear, Faulty transmission control module. The specific cause varies by vehicle.
How much does it cost to fix P0751 on a Chrysler?
Published repair estimates on Chrysler range from $5 to $8,000 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0751 on a different make?
View P0751 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.