P0714 on 2013 Ram 2500: Transmission Temperature Sensor Intermittent Causes and Fixes

What's Unique About the 2013-2013 Ram 2500

For the 2013 Ram 2500, equipped with the 68RFE transmission, the transmission temperature sensor is not a simple, externally-mounted part. It is integrated into the solenoid pack, also known as the Transmission Range Sensor (TRS) assembly, which sits on top of the valve body inside the transmission. This design means that what could be a simple sensor swap on other vehicles becomes a more involved repair, requiring removal of the transmission pan and filter to access the component. Multiple Technical Service Bulletins (TSBs) from Ram, such as TSB 18-091-16, address P0714 by recommending a PCM software update. The update changes the code from a sensitive one-trip fault to a two-trip fault, which can prevent the check engine light from illuminating due to minor, transient glitches rather than a hard part failure.

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
• Transmission temperature warning light may illuminate
• Harsh, erratic, or delayed shifts
• Transmission may get stuck in one gear (limp mode)
• Noticeable change in torque converter lock-up behavior
• A smell of burnt or overheating transmission fluid

Most Likely Causes

1. Failing Transmission Temperature Sensor 🔴 High Probability → Shop Transmission Assembly The sensor is part of the solenoid pack, subjected to constant heat cycles and vibration within the transmission, leading to eventual failure of the thermistor or its internal connections.
   How to confirm: Monitor the transmission temperature data on a live data scanner. 🎬 Watch: How to diagnose common 68RFE transmission problems with a scanner. Look for erratic, illogical jumps or dropouts in the temperature reading as the vehicle warms up. A healthy sensor shows a smooth, gradual increase. A wiggle test on the external harness while monitoring data can help isolate the issue.
   Typical fix: Replace the entire transmission solenoid pack/TRS assembly. On the 68RFE, the sensor is not serviced separately.
   Est. part cost: $250-$500
2. Wiring or Connector Issue 🟡 Medium Probability The internal transmission wiring harness is bathed in hot fluid, which can make insulation brittle over time. The main external connector is exposed to road debris and moisture. In some cases, the bolts holding the solenoid pack to the valve body can loosen, causing a poor connection and fluid cross-leaks.
   How to confirm: Inspect the main transmission connector for corrosion or damage. An internal wiring issue requires dropping the pan to inspect the harness leading to the solenoid pack. Check the torque on the bolts securing the solenoid pack to the valve body.
   Typical fix: Repair the damaged section of wiring or replace the faulty connector. If internal, the transmission solenoid harness may need to be replaced. If loose, torque the solenoid pack bolts to the manufacturer's specification.
   Est. part cost: $50-$250
3. Sensitive PCM Software 🟡 Medium Probability Chrysler issued multiple TSBs (e.g., #18-091-16) to address nuisance P0714 codes by making the diagnostic less sensitive. The original software may set the code during minor, temporary signal fluctuations that don't represent a true component failure.
   How to confirm: A dealership or a properly equipped independent shop can check the vehicle's current PCM software calibration and compare it against the latest version recommended by applicable TSBs.
   Typical fix: Reprogram (flash) the Powertrain Control Module (PCM) with the updated software. This is often the first step before replacing any hardware.
   Est. part cost: $0-$200 (Labor for the reflash)
4. Low or Degraded Transmission Fluid ⚪ Low Probability → Shop Transmission Assembly Neglecting fluid changes can lead to overheating, which stresses all components, including the sensor. Low fluid can cause erratic operation and temperature spikes.
   How to confirm: Check the transmission fluid level and condition. If it is low, dark, or has a burnt smell, it indicates a problem with the fluid or a potential leak.
   Typical fix: Perform a transmission fluid and filter change using the correct ATF+4 fluid. If the fluid was low, the source of the leak must be found and repaired.
   Est. part cost: $100-$200

Rare But Worth Checking

• Faulty Powertrain/Transmission Control Module (PCM/TCM): → Shop Transmission Assembly This is rare and should only be considered after the sensor, wiring, and software have been definitively ruled out. A diagnostic procedure using a transmission simulator tool (like Miller tool #8333) can help confirm if the module is processing the signal correctly.

Diagnosis Steps

1. Verify the code with a quality OBD-II scanner. Note any other codes present and check freeze-frame data.
2. Check for applicable Technical Service Bulletins (TSBs), specifically ones like #18-091-16 for the 2013 Ram 2500. If the PCM software is outdated, performing the recommended reflash is the first repair step.
3. Check the transmission fluid level and condition. Ensure it is at the correct level and does not smell burnt.
4. Using the scanner, monitor the live data stream for the Transmission Fluid Temperature. Watch for erratic jumps, dropouts to extreme values (like -38°C), or readings that don't change as the vehicle warms up.
5. Inspect the main external transmission wiring harness connector (C130, at the rear of the engine) for loose pins, corrosion, or damage. Perform a 'wiggle test' on the harness while monitoring live data to see if the reading fluctuates.
6. If external checks pass, the next step is to drop the transmission pan.
7. Test the sensor circuit at the solenoid pack connector. Check for correct resistance between Pin 23 (TFT Signal) and Pin 22 (Sensor Ground).
8. Visually inspect the internal wiring harness and check that the bolts securing the solenoid pack to the valve body are tight.
9. If wiring is intact and secure, the solenoid pack/TRS assembly containing the temperature sensor is the most likely culprit and should be replaced.
10. After replacement, refill with the correct fluid, clear codes, and perform a 'Quick Learn' and 'Drive Learn' procedure with a capable scan tool to calibrate the new components.

Parts You'll Likely Need

• Transmission Solenoid Pack / Range Sensor Assembly (OEM #68376695AB, 68376695AA) — On the 68RFE platform, the temperature sensor is integrated into this assembly. Replacing the whole unit is the standard repair. Part number 68376695AA has been superseded by 68376695AB.
  Trusted brands: Mopar, Rostra, RevMax
  OEM price range: $350-$500
  Aftermarket price range: $250-$400
• Transmission Filter and Pan Gasket Kit — This is required for any repair that involves dropping the transmission pan. The 68RFE uses two filters, a spin-on filter and a sump filter.
  Trusted brands: Mopar, Wix, ATP
  OEM price range: $40-$70
  Aftermarket price range: $20-$40
• Automatic Transmission Fluid (ATF+4) — The fluid must be drained to access the internal components and will need to be replaced with the correct Mopar-spec fluid. A pan drop requires approximately 6-8 quarts.
  Trusted brands: Mopar, Valvoline, Castrol
  OEM price range: $12-$20 per quart
  Aftermarket price range: $8-$15 per quart

Related Codes That Often Appear With This One

• P0711 — P0711 indicates a 'performance' issue with the same sensor, often set alongside P0714 when the signal is both irrational and intermittent. Multiple TSBs also address this code.
• P0712 — P0712 (Sensor Low) can be triggered if the intermittent fault causes the circuit to short to ground. Multiple TSBs also address this code.
• P0713 — P0713 (Sensor High) can be triggered if the intermittent fault causes an open circuit. Multiple TSBs also address this code.
• P0740 — This code for Torque Converter Clutch (TCC) circuit malfunction often appears with temperature codes because the TCM uses fluid temperature as a key factor in deciding when to lock and unlock the converter. Multiple TSBs also address this code.

Technical Service Bulletins (TSBs) & Recalls

• Bulletin #18-091-16
• Bulletin #18-057-15 REV A
• Bulletin #18-030-14
• Bulletin #18-043-17

Platform-Specific Known Issues

• Chrysler/Ram has issued multiple TSBs for the 68RFE transmission. TSB #18-091-16 is highly relevant to P0714 on the 2013 model. This bulletin involves reprogramming the PCM to change the fault logic from a one-trip to a two-trip fault. This makes the system less sensitive to brief, insignificant signal fluctuations that don't indicate a real problem, potentially preventing unnecessary repairs.

Mechanic-Grade Diagnostic Values

• Transmission Fluid Temperature Sensor Resistance — expected: Approximately 1,000 Ohms (1 kΩ) at 68°F (20°C). Resistance decreases as temperature increases.. Failure: An open circuit (infinite resistance), a shorted circuit (near zero resistance), or a resistance value that jumps erratically when tapping on the sensor or wiggling wires.
• Live Data - Transmission Fluid Temperature — expected: Should start near ambient temperature and climb steadily to a normal operating range of 160-190°F.. Failure: Value is stuck, jumps to extreme minimums (e.g., -40°F) or maximums, or fluctuates illogically during a steady drive.

Hidden / Shadow Codes Worth Checking

• P1713: TFT Sensor In Range Failure Low Value. This Chrysler-specific code indicates the sensor is providing a reading that is too low for the calculated operating conditions, even if it's not a hard short circuit. (see via Most comprehensive OBD-II scanners capable of reading manufacturer-specific codes.)
• P1718: TFT Sensor In Range Failure High. This Chrysler-specific code indicates the sensor is providing a reading that is too high for the calculated operating conditions, even if it's not a hard open circuit. (see via Most comprehensive OBD-II scanners capable of reading manufacturer-specific codes.)

Scan Tool Commands That Help

• wiTECH, Autel, Snap-on, Launch: Quick Learn — This procedure is mandatory after replacing the transmission or the solenoid/valve body assembly. It allows the TCM to quickly learn the hydraulic and electrical characteristics (clutch fill volumes) of the new components to ensure proper shift timing.
• N/A - Driving Procedure: Drive Learn — Immediately following a 'Quick Learn' procedure. It involves driving the vehicle with light throttle (15-25%) through all gears, repeating the process 5-10 times to allow the TCM to fine-tune the shift adapts under real-world load conditions.

Wiring & Ground Locations

• Solenoid Pack Connector — On the transmission solenoid pack, accessible after removing the transmission pan.. This is the primary point for testing the sensor directly. Pin 23 is the Transmission Temperature Sensor Signal, and Pin 22 is the Sensor Ground. Testing between these pins verifies sensor integrity.
• C130 Connector — A large 43-way connector located at the rear of the engine, acting as a jumper between the main engine harness and the transmission harness.. A loose connection, corrosion, or pushed-out pin in this critical connector can cause an intermittent signal from the transmission temperature sensor, mimicking a sensor failure.

Real Owner Repair Stories

• Forum Technician Post (Ram 2500 with 68RFE) — Intermittent transmission codes, including temperature and pressure faults.
  ❌ Tried (didn't work) Initial diagnosis pointed towards a faulty solenoid pack.
  ✅ What actually fixed it Upon dropping the pan, it was discovered that the bolts holding the solenoid pack to the valve body had loosened over time. This caused a poor connection and potential fluid cross-leaks, leading to intermittent electrical faults. The fix was to torque the bolts to spec; in many cases, the solenoid pack is replaced at the same time.
• Reddit user discussion (Ram with 68RFE) — Transmission intermittently goes into limp mode, and the temperature gauge reads an impossible -38°C (-36°F).
  ❌ Tried (didn't work) Concern about a major wiring harness short.
  ✅ What actually fixed it The consensus was that this is a classic symptom of an internal failure of the temperature sensor within the solenoid pack. A widespread wiring short would likely cause faults for multiple sensors sharing the same power or ground circuit. The fix was replacing the entire solenoid pack assembly.

"I Checked Everything" — The Actual Cause

• A common scenario for P0714 is that the sensor and external wiring test perfectly fine with a multimeter when the vehicle is cold and stationary. The actual cause, often missed, can be the bolts securing the solenoid pack to the valve body backing out slightly. This creates a micro-gap that only causes a connection issue when the transmission is hot and internal pressures are present, leading to an intermittent fault that is impossible to find with static tests.

OEM Part Supersession History

• 68376695AA → 68376695AB — Standard part revision and improvement by the manufacturer.
  Heads up: The superseding part 68376695AB is described as having a grey connector, while the pass 2 notes mentioned a white connector for this era. Both parts are listed as compatible, but be aware of potential connector color differences when ordering.
• 52120000AA → 68376695AA (and subsequently 68376695AB) — Early part number for this component, later revised.

Model Year Variations Within This Range

• 2010-2018: On 68RFE transmissions from 2010 and later, the Overdrive Solenoid Control circuit on Pin #7 of the main solenoid connector is no longer used. Technicians referencing older (pre-2010) wiring diagrams may be confused by the lack of a signal on this pin, but it is normal for this vehicle generation.