P2764 on 2015-2021 Jeep Renegade: TCC Solenoid and Torque Converter Guide

What's Unique About the 2015-2021 Jeep RENEGADE

The Jeep Renegade, particularly models equipped with the 2.4L engine, uses a ZF 9-speed (948TE) automatic transmission. This transmission is known for its complexity and has been the subject of numerous owner complaints and service bulletins across various FCA (Fiat Chrysler Automobiles) vehicles. While in the US this transmission was often marketed as 'sealed for life', European service schedules call for fluid changes around 60,000 kilometers, suggesting that fluid degradation can be a significant factor in component failure. TSBs for the Renegade, like 21-013-22, address symptoms like stalling and harsh shifts with software updates, highlighting the sensitivity of the control system.

Diagnostic Flowchart

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

Symptoms You May Notice

• Vehicle jerking or slipping, especially during acceleration.
• Shuddering, feeling like driving over rumble strips.
• Engine stalling when coming to a stop.
• Harsh or delayed gear shifts.
• Reduced fuel economy.
🎬 Watch: 9 common symptoms of a failing TCC solenoid.
• Transmission overheating warning light.
• Check Engine Light is on.

Most Likely Causes

1. Failed Torque Converter Clutch (TCC) Solenoid / Valve Body 🔴 High Probability → Shop Automatic Transmission Torque Converter The solenoids are submerged in hot fluid and can fail electrically or become clogged. On the 948TE, they are typically integral to the valve body and not serviced individually. A clogged valve body passage can also trigger this code.
   How to confirm: A technician can test the solenoid's circuit resistance from the main transmission connector to ground. A reading outside the specified range indicates a failure. A bidirectional scan tool can also command the solenoid to check for response.
   Typical fix: Replace the entire transmission valve body assembly. 🎬 Watch: Step-by-step walkthrough of a 948TE valve body replacement. A 'Quick Learn' procedure is required after replacement.
   Est. part cost: $350-$750
2. Failed Torque Converter 🟡 Medium Probability → Shop Automatic Transmission Torque Converter This is a known issue on the 948TE platform, as noted in manufacturer TSBs for related platforms. If the valve body, solenoids, and wiring are confirmed to be working correctly, an internal failure of the torque converter's lock-up clutch is the next most likely cause.
   How to confirm: This is typically diagnosed after ruling out all other possibilities, as stated in TSB #9004009. A stall speed test or observing metal debris in the transmission fluid can also point to an internal converter issue.
   Typical fix: Replace the entire torque converter assembly. This is a major repair requiring transmission removal.
   Est. part cost: $700-$1100
3. Low or Contaminated Transmission Fluid 🟡 Medium Probability → Shop Transmission Assembly Despite being marketed as 'sealed for life' in the US, the fluid can break down. Lack of a dipstick makes checking the level difficult for owners. Degraded fluid can cause solenoids to stick and passages to clog.
   How to confirm: A technician must check the fluid level and condition via the fill port, often with the vehicle running at a specific temperature. The fluid should be clean and not smell burnt. 🎬 See this DIY guide for changing your 9-speed transmission fluid.
   Typical fix: Perform a transmission fluid and filter change using the manufacturer-specified fluid (Mopar ZF 8&9 Speed ATF).
   Est. part cost: $150-$300
4. Damaged Wiring or Connectors ⚪ Low Probability The wiring harness to the transmission can be damaged by road debris or heat, causing a short or open circuit, leading to a low voltage reading.
   How to confirm: Visually inspect the wiring harness. Check for continuity and voltage at the solenoid connector with a multimeter.
   Typical fix: Repair or replace the damaged section of the wiring harness.
   Est. part cost: $20-$300

Rare But Worth Checking

• Faulty Transmission Control Module (TCM) or Powertrain Control Module (PCM): → Shop Transmission Assembly This is a rare cause and should only be considered after all other possibilities have been ruled out. TSBs do exist for TCM software updates to fix related symptoms, indicating the module's software can be a factor.

Diagnosis Steps

1. Check and document any stored trouble codes and review freeze-frame data.
2. Inspect the transmission fluid level and condition. This requires a specific procedure involving temperature checks. Burnt or dark fluid with metal particles indicates a serious internal problem.
3. Visually inspect the transmission wiring harness and connectors for any signs of damage, corrosion, or loose connections.
4. Using a professional scan tool, check for any available Transmission Control Module (TCM) software updates, as TSBs like 21-013-22 address related symptoms.
5. Test the TCC solenoid circuit. Disconnect the main transmission harness connector and use a multimeter to measure the resistance between the TCC solenoid control pin and a chassis ground. Compare this reading to the manufacturer's specification to identify an open or shorted solenoid.
6. If the solenoid circuit tests good, the problem is likely an internal failure of the torque converter, as per TSB #9004009.
7. After any repair involving the valve body or transmission, perform the 'Transmission Quick Learn' procedure as outlined in TSB 21-013-16 Rev. B to ensure proper shifting.

Parts You'll Likely Need

• Transmission Valve Body Assembly (with Solenoids) (OEM #R8318224AA) — The TCC solenoid is the most common electrical failure point. On the 948TE, it is sold as part of the complete valve body assembly.
  Trusted brands: Mopar (Remanufactured)
  OEM price range: $400-$600
  Aftermarket price range: $300-$500
• Torque Converter (OEM #52109292AD) — If the solenoid/valve body is not the cause, an internal failure of the torque converter is the next likely culprit, as noted in TSB #9004009.
  Trusted brands: Mopar, LuK, Transtar
  OEM price range: $700-$1100
  Aftermarket price range: $400-$600
• Automatic Transmission Fluid (OEM #68218925AB) — Fluid must be replaced when the valve body or torque converter is replaced. Using the correct fluid is critical for the 948TE transmission.
  Trusted brands: Mopar ZF 8&9 Speed ATF
  OEM price range: $25-$40 per quart
  Aftermarket price range: $15-$25 per quart

Related Codes That Often Appear With This One

• P0740 — This code also relates to the Torque Converter Clutch Circuit Malfunction. The two codes often appear together for the same underlying issues of a failing solenoid or torque converter.

Technical Service Bulletins (TSBs) & Recalls

• TSB 21-013-22: Involves a TCM software update to address harsh shifts and possible engine stalling when shifting to neutral, symptoms that overlap with P2764.
• TSB 21-013-16 Rev. B: Details the mandatory 'Quick Learn' procedure required after transmission repairs to ensure proper shift quality.

Platform-Specific Known Issues

• The 9-speed ZF 948TE transmission in the Renegade is known for drivability issues. Many problems, including harsh shifts and stalling, have been addressed by a series of TCM software updates from Jeep, especially for 2015-2016 models.
• The 'sealed for life' designation in the US market may lead to premature fluid breakdown and component failure if service is neglected.

Mechanic-Grade Diagnostic Values

• TCC Solenoid Circuit Voltage — expected: Approximately 12 V (+/- 0.5 V) with ignition on.. Failure: A reading below 9 V indicates a low-voltage condition in the circuit.
• TCC Solenoid Resistance — expected: Generally between 10 and 30 ohms, but vehicle-specific data is best. For example, some similar solenoids on other vehicles target 12-15 ohms.. Failure: A reading significantly outside the expected range (e.g., very low like 2-3 ohms, or very high/open circuit) indicates a failed solenoid.
• Solenoid Ground Strap to Chassis Resistance — expected: Below 0.1 Ω. Failure: Values above 0.1 Ω suggest a poor ground connection that needs to be cleaned or repaired.

Scan Tool Commands That Help

• wiTECH (or equivalent professional scanner): TCC Solenoid Actuation Test — This bidirectional command allows a technician to manually turn the TCC solenoid on and off while monitoring circuit voltage to confirm if the solenoid is responding electrically and if the TCM is capable of sending the command.

Wiring & Ground Locations

• TCC Solenoid Wire — At the Transmission Control Module (TCM) connector, which is located on the transmission itself.. For a 2018 Renegade, the wire for the 'Pressure Control Solenoid Torque Converter' is Yellow with a Black stripe (YEL/BLK) at Pin 17 of the TCM connector. This is the specific circuit that must be tested for voltage and continuity back to the valve body.
• Main Engine/Chassis Ground Strap — Typically connects from the engine block or an engine mount to the vehicle's chassis/frame.. A corroded or broken main ground strap can create a voltage offset or unstable ground reference for the entire powertrain, potentially causing the TCM to incorrectly report a 'Circuit Low' condition for a perfectly good solenoid.

"I Checked Everything" — The Actual Cause

• A common diagnostic pattern for this code, supported by manufacturer TSB #9004009, is when all electrical tests for the TCC solenoid and its circuit pass (voltage, resistance, and wiring continuity are all good), yet the code persists. In this scenario, the root cause is not electrical but a mechanical failure inside the torque converter itself.

Model Year Variations Within This Range

• 2015-2016: The initial release of the 948TE transmission in these earlier models was subject to a higher number of Technical Service Bulletins (TSBs) and software updates to correct a wide variety of shift quality and performance complaints. It is critical to ensure the latest TCM software is installed before condemning hardware on these earlier vehicles.