P2764 on 2012-2019 Fiat 500: Torque Converter and Solenoid Guide

What's Unique About the 2012-2019 Fiat 500

The Fiat 500 from this era uses a 6-speed automatic transmission known as the Chrysler 62TE. This is significant because Fiat Chrysler Automobiles (FCA) issued a Technical Service Bulletin (TSB #9004009) for all vehicles with this transmission, including many Dodge, Chrysler, and Ram models. The bulletin provides a clear diagnostic path for code P2764: if the vehicle is jerking or slipping, technicians should first check the TCC solenoid. If the solenoid is functioning correctly, the TSB states that the code indicates a torque converter failure, which should then be replaced.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this vehicle.

Symptoms You May Notice

• Check Engine Light is on
• Vehicle jerking or slipping during acceleration.
• Harsh, erratic, or delayed gear shifts.
• Transmission feels like it's slipping (engine RPMs rise without an increase in speed).
• Stalling when coming to a stop, especially when shifting from Park to Drive. The engine may run fine in Reverse.
• A 'rumble strip' shudder or vibration during light acceleration.
• Decreased fuel efficiency.
• Transmission may enter "limp mode," limiting available gears.

Most Likely Causes

1. Faulty Torque Converter Clutch (TCC) Solenoid / Solenoid Pack 🔴 High Probability → Shop Automatic Transmission Torque Converter The TCC solenoid is a known failure point on the 62TE transmission. It can fail electrically (causing the circuit low code) or get mechanically stuck from debris. The official manufacturer TSB points to this as a primary cause, and ATRA bulletin #1648 describes it getting stuck 'ON'.
   How to confirm: A technician can command the solenoid on and off with a bidirectional scan tool to check its response. 🎬 Watch: How to test the solenoid pack with a scan tool. They can also test the solenoid's resistance and check for voltage at the connector. A common symptom of a stuck solenoid is the engine stalling in Drive but not in Reverse.
   Typical fix: Replace the TCC solenoid. On the 62TE, this solenoid is typically part of the main solenoid pack (or block), which is replaced as a single unit. This is done by removing the transmission pan. 🎬 See this walkthrough on replacing the 62TE solenoid pack. Some experienced DIYers have documented this repair.
   Est. part cost: $250-$450
2. Failed Torque Converter 🔴 High Probability → Shop Automatic Transmission Torque Converter The manufacturer TSB #9004009 explicitly states that if the TCC solenoid is not the cause, the torque converter itself has likely failed. This is a very common failure on the 62TE transmission across all platforms it was used in.
   How to confirm: This is typically diagnosed by exclusion. If the fluid is clean, the wiring is good, and the solenoid tests okay, the torque converter is the remaining likely culprit as per the TSB. A transmission specialist can also monitor TCC slip RPM with a scan tool; excessive slip under lock-up conditions confirms a bad converter. 🎬 Watch: What a failing torque converter sounds and looks like.
   Typical fix: Replace the torque converter. This is a major repair that requires removing the entire transmission from the vehicle.
   Est. part cost: $150-$500
3. Low or Contaminated Transmission Fluid 🟡 Medium Probability → Shop Transmission Assembly Old, burnt, or low fluid cannot provide the hydraulic pressure needed for the solenoid to operate correctly. Debris in the fluid can also clog the solenoid or valve body passages, leading to a stuck solenoid or other faults.
   How to confirm: Check the transmission fluid level and condition using the dipstick (an aftermarket tool may be required for some models). If the fluid is dark, has a burnt smell, or contains metallic particles, it is contaminated and needs to be changed.
   Typical fix: Perform a transmission fluid and filter change. Use only the specified Mopar ATF+4 fluid or a certified equivalent. If the fluid is heavily contaminated, a more thorough flush may be needed, though this is debated among technicians.
   Est. part cost: $75-$200
4. Wiring or Connector Issue ⚪ Low Probability The wiring harness leading to the transmission can become damaged from heat or road debris, or connectors can corrode, causing a low voltage signal.
   How to confirm: Visually inspect the wiring harness for any signs of fraying, melting, or damage. Use a multimeter to check for continuity and proper voltage at the solenoid connector.
   Typical fix: Repair the damaged section of the wiring harness or clean/replace the corroded connector.
   Est. part cost: $10-$100

Rare But Worth Checking

• Faulty Transmission Control Module (TCM): → Shop Transmission Assembly While rare, the TCM itself can fail and stop sending the correct voltage to the solenoid. This should be considered only after all other possibilities (solenoid, converter, fluid, wiring) have been thoroughly ruled out, as it is an expensive part.

Diagnosis Steps

1. Read the code with an OBD-II scanner and document any other codes present, especially P0740.
2. Check the level and condition of the automatic transmission fluid. Burnt, dark, or low fluid can cause this issue and indicates a need for service.
3. Inspect the transmission wiring harness and connectors for any visible damage, corrosion, or loose connections.
4. Using a bidirectional scan tool, command the TCC solenoid on and off to test its functionality. Check for proper voltage at the solenoid connector.
5. Listen for engine bogging or stalling when shifting into Drive. If it stalls in Drive but not in Reverse, suspect a mechanically stuck TCC solenoid as described in ATRA TSB #1648.
6. If the solenoid is unresponsive, the circuit shows low voltage despite good wiring, or it is mechanically stuck, replace the TCC solenoid/solenoid pack.
7. If the solenoid and wiring test correctly, follow the guidance of TSB #9004009 and suspect a failed torque converter.
8. After any repair involving the solenoid pack or transmission replacement, perform a 'Quick Learn' or 'Adaptation Learn' procedure with a compatible scan tool to ensure proper shift quality.
9. Clear the codes and perform an extensive test drive to ensure the issue is resolved.

Parts You'll Likely Need

• Transmission Solenoid Pack (OEM #68371508AB) — This is the most likely electrical component to fail according to TSBs and repair databases. It contains the TCC solenoid and is replaced as a complete unit. This part number supersedes previous versions like 5078709AA, 5078709AB, and 68371508AA.
  Trusted brands: Mopar, Dorman (Remanufactured), Rostra
  OEM price range: $400-$600
  Aftermarket price range: $150-$300
• Torque Converter (OEM #68102678AA) — If the solenoid is not at fault, the TSB points directly to a mechanical failure of the torque converter.
  Trusted brands: Mopar, Luk, Transtar
  OEM price range: $200-$400
  Aftermarket price range: $150-$250
• Automatic Transmission Fluid — Fluid must be replaced when dropping the pan for a solenoid replacement or when replacing the torque converter. Use only the fluid specified for the 62TE transmission (Mopar ATF+4 or equivalent).
  Trusted brands: Mopar, Valvoline, Castrol
  OEM price range: $15-$25 per quart
  Aftermarket price range: $8-$15 per quart

Related Codes That Often Appear With This One

• P0740 — This code also relates to the Torque Converter Clutch Circuit. The manufacturer TSB #9004009 and ATRA TSB #1648 explicitly group P2764 and P0740 together as pointing to the same potential failures (TCC solenoid or torque converter).

Technical Service Bulletins (TSBs) & Recalls

• FCA TSB #9004009: For vehicles with a 62TE transmission,

Platform-Specific Known Issues

• A key issue for this platform is the guidance from FCA TSB #9004009. It specifically addresses codes P2764 and P0740 on 62TE transmissions, stating that if the TCC solenoid is confirmed to be operational, the torque converter should be replaced. This provides a very direct, though potentially expensive, diagnostic path.
• ATRA Technical Bulletin #1648 provides an even more specific symptom: a vehicle with a 62TE that stalls when put into Drive but not Reverse. This is caused by the TCC solenoid being mechanically stuck on, and the fix is to replace the solenoid (specifically part #5169313AA, which is the individual TCC solenoid).

Mechanic-Grade Diagnostic Values

• TCC (EMCC) VFS Solenoid Resistance — expected: 4.8 - 5.1 Ohms at ~70°F. Failure: A reading outside this range indicates an electrical failure within the solenoid.
• Shift Solenoid Resistance (for comparison) — expected: 1.6 - 1.8 Ohms at ~70°F. Failure: If testing multiple shift solenoids, a reading that is significantly different from the others indicates a failing solenoid within the pack.
• TCC Solenoid Circuit Test (at transmission connector) — expected: Test resistance between Pin 10 (Power from Trans Control Relay) and Pin 3 (TCC VFS control). The reading should match the solenoid's specified resistance (4.8 - 5.1 Ohms).. Failure: An open circuit (infinite resistance) or a short to ground (zero resistance) indicates a wiring problem or a failed solenoid.

Scan Tool Commands That Help

• wiTECH, Autel, or equivalent professional scan tool: Quick Learn (62TE) — This procedure is required after replacing the transmission, valve body, or solenoid pack to allow the TCM to learn the hydraulic and electrical characteristics of the new components. Failure to perform this can result in harsh or erratic shifting.
• wiTECH or equivalent: Clear VLP Counters — After a transmission repair or PCM flash, the Variable Line Pressure (VLP) counters should be cleared from the PCM's miscellaneous functions menu to reset adaptive values.

Wiring & Ground Locations

• Transmission Connector Pin 10 — The main round electrical connector on the 62TE transmission case.. This is the main power feed to the solenoid pack from the Transmission Control Relay. It is used as the common positive lead for resistance tests on all solenoids.
• Transmission Connector Pin 3 — The main round electrical connector on the 62TE transmission case.. This is the specific control circuit for the TCC (EMCC) Variable Force Solenoid. A 'Circuit Low' fault on P2764 points directly to a problem with the wire connected to this pin or the solenoid itself.
• Main Earth/Ground Strap — Connects from the chassis leg (often below the battery tray) to a mounting bolt on the gearbox housing.. This strap is a known corrosion point on Fiat 500s. A poor ground connection can cause a variety of electrical issues, including low voltage faults like P2764, as the TCM may not have a stable ground reference.

Real Owner Repair Stories

• ATRA Technical Bulletin #1648 (Chrysler vehicle with 62TE transmission) — After a long highway trip, the engine would die every time the transmission was put into Drive, but not in Reverse. Code P2764 was set.
  ❌ Tried (didn't work) The bulletin describes this as a direct diagnosis, not a trial-and-error process.
  ✅ What actually fixed it The cause was identified as a mechanically stuck-on TCC solenoid. The fix was to replace the defective TCC solenoid, specifically Mopar part # 5169313AA.
• Reddit user report in r/AskMechanics (2017 Dodge Grand Caravan with 62TE transmission) — Clunky, jerky shifting between R, N, D. Sometimes would not engage Drive. Code P0758 (Shift Solenoid B) was present.
  ❌ Tried (didn't work) Transmission fluid and filter change., Replacing only the individual TCC solenoid.
  ✅ What actually fixed it Replacing the entire solenoid pack fixed the initial shifting problems and cleared the P0758 code. (Note: The user later developed different codes related to fluid pressure, indicating a possible secondary issue or incorrect fluid level).

When the Usual Fixes Don't Work

• While replacing the solenoid pack is a common fix, some owners have reported that this only temporarily resolves the issue. In one case involving a 62TE transmission, a new solenoid pack fixed the initial fault code, but new codes for low transmission fluid pressure (P0868) appeared shortly after, despite the fluid level being correct. This suggests that an electrical code like P2764 can sometimes be a symptom of a deeper, underlying mechanical or hydraulic problem, such as an internal leak or a failing transmission pump, that isn't resolved by replacing the electronics.

OEM Part Supersession History

• 5078709AA, 5078709AB, 68371508AA, 68376696AA → 68371508AB — Part has been revised by the manufacturer over time to improve reliability or address known failure modes.
• N/A → 5169313AA — This is the part number for the individual TCC (EMCC VFS) solenoid, which can be replaced separately from the main pack, as noted in ATRA bulletin #1648.
  Heads up: This is for replacing only the TCC solenoid, not the entire solenoid block.

Model Year Variations Within This Range

• Approx. 2007-2012: Early 62TE transmissions had an issue where the two ceiling rings in the compounder section could spin, causing excessive wear and pressure leaks. Later models (~2012+) were updated with locking rings to prevent this spinning and wear.