P0751 on Chrysler: How to Diagnose & Fix
Shift Solenoid A Performance/Stuck Off
4 Chrysler models · 4 documented issues · 4 critical · $200-$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
Read all transmission codes with a scan tool that shows Chrysler-specific codes (owners commonly report P0700 together with P1776 and limp mode locked in 2nd gear). If the speedometer drops to zero and the car is stuck in 2nd gear, test the input and output speed sensors first, a frequently reported failure. On 2002-2004 cars, owners report that P1776 most often points to the solenoid/pressure switch assembly (solenoid pack), though some also needed the valve body; check fluid level and wiring before replacing parts, and refill with ATF+4 only. One owner reports paying about $700 for the solenoid pack and sensors. Slipping or harsh shifts that persist after these repairs indicate internal clutch or torque converter wear, which needs a rebuild or replacement transmission ($2,500-$3,500).
Sources for this issue (2)
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
Start with the cheap checks before agreeing to a rebuild. First, have the shop read the transmission codes with a scan tool. Next, check the fluid level and condition. Chrysler bulletin 21-006-01 covers automatic transmission fluid use (ATF+4), so make sure ATF+4 is what goes in. Then inspect the transmission wiring connector and the solenoid pack. These are the most common failure points, and both can be serviced without removing the transmission. If the complaint is a shudder at highway speed when the torque converter locks up, ask the shop to check Chrysler bulletins 21-05-97 and 18-09-97. Both cover shudder during EMCC (converter lock-up) operation on the 41TE/42LE. If the car is slow to go into gear, bulletin 21-07-98 covers delayed transaxle engagement. These are service bulletins, not recalls. If the codes and the slipping point to worn internal clutches, the transmission needs a rebuild or a replacement unit. On CarComplaints, owners report that the most common LHS transmission problems cost about $1,200 to fix, at around 84,000 miles. Owners of the 1999 model who reported transmission failure averaged about $2,400.
Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.
Sources for this issue (3)
In PHEV models, a short in an internal transmission wiring connector (or, on some vans, a rotor bearing installation defect) can shut the gas engine down unexpectedly while driving and send the vehicle into limp mode or cause it to lose motive power entirely. Recall 03A / NHTSA 23V010 was issued for this.
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. Dealers update the Power Inverter Module (PIM) software, plus the instrument cluster and powertrain control module software on 2017-2018 vans, free of charge. Vans that show the related warning messages get a transmission replacement under Warranty Extension XE1, which has no time or mileage limit.
Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.
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.
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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 (2)
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 4 models: 300M, 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 $200 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.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.