P0750 on Chrysler: How to Diagnose & Fix
Shift Solenoid A Malfunction
7 Chrysler models · 9 documented issues · 7 critical · $100-$3,500 repair
P0750 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)
The Concorde's 42LE 4-speed automatic transmission suffers from solenoid pack failures that cause erratic shifting, limp mode, and delayed engagement. The internal solenoid seals deteriorate, causing pressure loss and harsh or missed shifts.
Common Symptoms
- Transmission stuck in second gear (limp mode)
- Harsh or delayed shifts
- Check engine light with transmission codes
- No reverse
- Slipping between gears
- Delayed engagement when shifting to drive
How to Fix
Replace the transmission solenoid pack assembly and filter. A full transmission fluid flush is recommended at the same time. If the transmission has been driven extensively in limp mode, internal hard parts may also be damaged.
Sources for this issue (1)
The LeBaron uses the Chrysler A604 (41TE) 4-speed electronically-controlled automatic transaxle. This was one of the first fully electronic automatics and its solenoid pack is the primary failure point. The solenoids develop internal leaks and electrical failures, causing erratic shifting, no-shift conditions, and limp mode (locked in 2nd gear). The transmission controller can also fail. The A604 was so problematic that Chrysler extended warranty coverage on early units.
Common Symptoms
- Transmission stuck in 2nd gear (limp mode)
- Check engine light with P0700 and P07XX codes
- Harsh or erratic shifting between all gears
- No upshift from 2nd gear
- Transmission bangs into gear from Park
How to Fix
Replace the solenoid pack assembly (located in the valve body) with an updated unit. The solenoid pack is accessible by removing the side pan. A remanufactured solenoid pack from TransGo or Rostra is $150-250. If the transmission is in limp mode, scan for codes first — many limp mode events are caused by a speed sensor or input/output shaft sensor failure rather than the solenoid 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)
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)
The automatic transmission develops solenoid pack failures and valve body wear causing harsh shifts, delayed engagement, and limp mode. The transmission control module can also develop cold solder joints causing intermittent issues.
Common Symptoms
- Harsh 1-2 shift
- Limp mode (2nd gear only)
- Delayed engagement from Park
- Check engine light
How to Fix
Replace solenoid pack and filter. Inspect the valve body for wear. If the TCM is suspected, check connections and re-solder cold joints if possible. Use only Mopar ATF+4 fluid.
Sources for this issue (1)
The Fifth Avenue uses the Chrysler A604 (41TE) fully electronic 4-speed transaxle, which was notorious for reliability issues in its early years. The solenoid pack and valve body suffer from design limitations that cause erratic shifting and limp mode. The transmission goes into "limp home" mode (locked in 2nd gear) as a protective measure when it detects solenoid or pressure errors. The Fifth Avenue's heavier curb weight compared to other A604-equipped vehicles accelerates wear.
Common Symptoms
- Limp mode — stuck in 2nd gear with check engine light
- Harsh engagement from Park to Drive or Reverse
- Delayed shifts with engine revving between gears
- No 4th gear overdrive
- Transmission temperature warning
How to Fix
Replace the solenoid pack and valve body separator plate with updated parts. Change the ATF+4 fluid every 30,000 miles — the A604 is extremely sensitive to fluid condition. If the transmission has been running in limp mode repeatedly, internal clutch damage is likely and a rebuild is needed. A TransGo TFOD-3 reprogramming kit can be installed during a rebuild to improve shift quality.
Sources for this issue (1)
P0750 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 P0750 mean on a Chrysler?
P0750 stands for "Shift Solenoid A Malfunction." This code indicates the transmission control system detected a malfunction in shift solenoid 'A', one of the electrically operated valves that direct hydraulic fluid to engage gears. The computer commands these solenoids to control upshifts and downshifts, and it monitors their circuits and the resulting gear changes. When solenoid A doesn't respond electrically as expected — or the resulting shift doesn't happen correctly — this code is set. You may notice harsh, delayed, or missing shifts, or the transmission may enter a fail-safe (limp) mode. On Chrysler it is documented across 7 models: 300M, Concorde, LeBaron, LHS, Fifth Avenue, Prowler, Cirrus.
What are the most common causes of P0750?
The most common causes of P0750 are: Failed or stuck shift solenoid A, Open, shorted, or chafed solenoid wiring, Corroded or loose transmission connector, Low, dirty, or degraded transmission fluid, Clogged solenoid or valve body passages, Internal valve body or hydraulic fault, Faulty transmission control module (TCM). The specific cause varies by vehicle.
How much does it cost to fix P0750 on a Chrysler?
Published repair estimates on Chrysler range from $100 to $3,500 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 P0750 on a different make?
View P0750 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.