P0720 Code: Jeep Cherokee (2019-2023) - Causes, Symptoms & Fixes

No recalls found in NHTSA database

According to the data provided, there are no NHTSA owner complaints or recalls tied to P0720 for the 2019–2023 Jeep Cherokee. The guide below uses general automotive diagnostic knowledge tailored to the P0720 code and the Cherokee transmission setup, but it does not rely on any Jeep-specific recall/TSB entries from the data you supplied.

CODE MEANING AND SEVERITY

• What P0720 means

  • P0720 = Output Shaft Speed Sensor Circuit Malfunction (also called Output Speed Sensor Malfunction in many charts).
  • The PCM/TCM monitors the transmission’s output shaft speed sensor (OSS) signal to verify correct gear position and transmission operation. If the signal is out of range, erratic, or missing, the PCM triggers P0720.

• How severe is it?

  • Severity ranges from a drivability nuisance to a transmission operation issue. Typical consequences can include:
    • Harsh or incorrect shifting
    • Slipping or hard shifts
    • Possible loss of certain gears or “limp mode” behavior in some cars
    • Check Engine Light with potential loss of shifting intelligence or cruise control quirks
  • In many cases, P0720 may occur with other codes; it can be a sensor/wiring fault, but it can also indicate PCM/TCM concerns or an internal transmission fault. A precise diagnosis is essential before part replacement.

COMMON CAUSES ON JEEP CHEROKEE

• Most common

  • Faulty Output Shaft Speed Sensor (OSS) itself
  • Damaged, frayed, corroded, or unplugged OSS wiring harness/connectors
  • Poor or dirty electrical connections at the OSS or PCM/TCM
  • Damaged transmission grounds or wiring routing causing intermittent signals
  • PCM/TCM software glitch or the need for an update (non-recall, but sometimes software-induced symptoms)
  • Internal transmission issue that affects the OSS signal (less common, but possible)

• Less common but possible

  • Incorrect transmission fluid level or degraded fluid (contamination or wrong spec)
  • Transmission internal wear or sensor mounting misalignment
  • Battery or power supply instability causing sensor signal instability

Note: The 2019–2023 Cherokee typically uses an automatic transmission (often ZF-based) with an OSS sensor located near the transmission tail or output area. Exact sensor location can vary slightly by model/engine/transmission option.

SYMPTOMS TO WATCH FOR

• Illumination of the Check Engine Light (CEL) or ABS/Traction lights
• Rough, harsh, or delayed upshifts/downshifts
• Shuddering or slipping during acceleration
• Transmission stuck in a low gear or limited to certain gears (possible limp-mode behavior)
• Inconsistent or unusual vehicle speed indication in some drives
• Cruise control disengagement or abnormal transmission behavior when speed fluctuates
• Transmission fluid smell or leaking signs (less direct, but worth checking if wiring/connector leads to water/solvent exposure)

DIAGNOSTIC STEPS (SYSTEMATIC APPROACH)

Preparation

• Use a capable scan tool that can read transmission data PIDs (not just generic OBD-II).
• Record freeze-frame data and live OSS readings alongside vehicle speed and engine RPM.
• Check for any related or historical codes (e.g., P0715, P0721, P0722, P0717, etc.).

Step-by-step

Confirm the code and observe live data

• Confirm P0720 reappears after clearing codes.
• Monitor OSS signal vs. engine RPM and vs. vehicle speed. OSS should correlate with the transmission’s operation and generally increase with RPM. Look for:
  • A missing or erratic OSS signal
  • A signal that does not scale properly with RPM
  • A signal that is out of spec relative to vehicle speed

Inspect the OSS sensor and harness

• Visually inspect the OSS sensor and its wiring harness for damage, abrasion, moisture intrusion, or loose connectors.
• Disconnect the sensor connector and inspect pin/terminal condition for corrosion or bent pins.
• Check for oil/trans fluid leaks near the sensor area that could affect insulation or connections.

Test the OSS sensor and circuit

• Resistance/continuity: With the ignition OFF, measure the sensor circuit resistance and continuity from the OSS connector to the PCM/TCM input (check service manual for the correct pins and expected resistance range).
• Power/ground check: Verify the OSS sensor receives proper supply voltage (often a 5V reference from the PCM and a ground return) and that the ground path is solid.
• Signal integrity: Using an oscilloscope or a graphing multimeter, observe the OSS signal as RPM changes. A healthy sensor typically shows a clean, proportional signal with RPM; a flat, erratic, or noisy signal indicates a fault.

Check the related circuitry

• Inspect transmission grounds and the main engine/body grounds that could affect sensor readings.
• Inspect the PCM/TCM-related connectors for corrosion, bent pins, or water intrusion.
• Look for other codes that point toward sensor or wiring faults (P0715, P0721, P0722, etc.).

Fluid and mechanical check

• Check transmission fluid level, condition, and the correct specification. Low or burnt fluid can cause shifting issues and may indirectly affect sensor readings via temperature changes or internal pressure issues.
• If the fluid is old or degraded, consider performing a service (detailed guidelines depend on the transmission type and service procedures).

Consider software/ECU considerations

• If sensors and wiring test good, a software/firmware update for the PCM/TCM may be indicated by a dealer or service bulletin (note: no recalls are listed in your data; not all software updates are recalls).
• Reflash or reprogramming should be performed with proper diagnostic tools and calibration files for the specific VIN/engine/transmission combination.

Decide on replacement vs repair

• If OSS sensor, wiring, and grounds test good, but the fault persists, you may need to replace the OSS sensor and re-test.
• If after sensor replacement the fault persists, suspect PCM/TCM or an internal transmission issue and plan further diagnostic steps or professional service.

RELATED CODES

• P0715: Input/Turbine Speed Sensor Circuit Malfunction (related to speed sensors in transmission)
• P0721: Output Speed Sensor Circuit Range/Performance
• P0722: Output Speed Sensor Circuit No Signal
• P071x family references (varies by make/model) to speed sensor circuits in the transmission
• Note: Related codes often appear with P0720 when there are sensor integrity or wiring issues

REPAIR OPTIONS AND COSTS (2025 PRICES)

Prices vary by region, shop, and whether you use OEM parts. The ranges below are typical ballpark figures to help budgeting.

• OSS sensor replacement

  • Parts: $20–$120 (factory/OEM varies by sensor type)
  • Labor: $60–$180
  • Typical total: $80–$300

• Wiring harness/connector repair or replacement

  • Parts: $10–$80 (if only connectors or loom inline)
  • Labor: $60–$180
  • Typical total: $100–$350

• Sensor harness cleaning/repair (non-destructive)

  • Parts: minimal
  • Labor: $40–$120
  • Typical total: $60–$140

• Transmission software update or reprogramming

  • Dealer/FR tech: $50–$150 (varies by labor rate and whether a full flash is required)
  • Independent shop: $40–$120
  • Note: Not all cases require software; this is for cases where a software issue is suspected

• Transmission fluid service (if fluid is due or deemed beneficial)

  • Parts: $15–$40 (fluid)
  • Labor: $60–$150
  • Typical total: $75–$190

• Transmission removal/rebuild/replacing OSS sensor with transmission service (rare)

  • Parts: $10–$200 (sensor and seal kit)
  • Labor: $500–$1,500 (with transmission out/in)
  • Typical total: $600–$1,700 (sensor-related), more if significant transmission service is needed

• Full transmission replacement (extreme scenarios)

  • Parts: $1,000–$3,000 (rebuild kit) plus core costs
  • Labor: $1,500–$4,000
  • Typical total: $2,500–$7,000+
  • Note: This is a last-resort scenario if the transmission itself is failing and the OSS fault cannot be resolved otherwise

DIY VS PROFESSIONAL

• DIY-friendly tasks (if you have medium-to-advanced mechanical/electrical skills)

  • Visual inspection of OSS sensor, connector, and harness
  • Basic testing with a multimeter to check continuity and resistance (per service manual)
  • Cleaning/seat connectors and reseating the harness
  • Replacing the OSS sensor with step-by-step following the service manual (requires some transmission access and torque specs)

• DIY considerations

  • The OSS sensor location and wiring can be awkward; ensure you have proper safety gear, stands, and a tutorial or service manual for torque specs and pinouts
  • If the transmission requires removal to access the OSS, that is typically a professional job

• When to go professional

  • If the OSS test is inconclusive or you cannot reliably access the sensor
  • If the transmission must be removed to reach or replace the sensor
  • If a software update or PCM/TCM reflash is needed or if multiple sensors/ECU calibrations must be performed
  • If symptoms persist after sensor and wiring replacement

PREVENTION

• Regular transmission maintenance
  • Use the manufacturer-recommended transmission fluid and change intervals
  • Check fluid level and condition periodically; address leaks promptly
• Electrical care
  • Inspect wiring harnesses and connectors near the transmission for wear, moisture, or heat damage
  • Ensure protective routing of wires to avoid chafing or pinching
• Prevent contamination
  • Keep the engine bay and transmission area clean of fluids that can degrade connectors; fix leaks promptly
• Driving habits
  • Avoid aggressive driving that increases transmission heat and wear
  • Regularly drive the vehicle to ensure sensors and electronics stay in good working order
• Software and calibration
  • Keep the vehicle’s powertrain software up to date as recommended by the dealer; however, verify that updates are appropriate for your VIN and transmission configuration

Data limitations and transparency

• Data note: No recalls found in NHTSA database for this specific 2019–2023 Jeep Cherokee P0720 scenario.
• There were no NHTSA owner complaints in the provided data for this combination.
• This guide relies on general automotive diagnostic knowledge for P0720 plus typical Jeep Cherokee 9-speed/OSS configurations. It does not reference any Jeep-specific recall/TSB data from the provided data set.
• Actual diagnosis should be performed with a capable scan tool and, if needed, service manuals or a dealership diagnostic session.