P0847 on 2020-2022 Ford Escape 1.5L: Transmission Sensor Code & Wiring Fixes

What's Unique About the 2020-2022 Ford Escape

For the 2020-2022 Escape with the 1.5L engine, code P0847 is rarely about the transmission sensor it names. Instead, it's a common symptom of a larger problem outlined in Ford Technical Service Bulletins (TSBs). The engine wiring harness (part number family 14290) is known to be routed too close to the steering shaft. As the wheel turns, the shaft can rub through the harness insulation, causing a short circuit that triggers P0847 and a host of other unrelated sensor codes.

Symptoms You May Notice

• Check Engine Light (Malfunction Indicator Lamp) is on
• Wrench light may be illuminated
• Engine runs rough or stalls
• Blown fuse (specifically fuse 44 in the engine compartment fuse box)
• Harsh or unpredictable transmission shifting
• Transmission may be stuck in one gear (limp mode)
• Multiple other warning lights or seemingly unrelated trouble codes present

Most Likely Causes

1. Chafed Engine Wiring Harness (14290 Harness) 🔴 High Probability As documented in Ford TSBs SSM 50116 and SSM 50245, the harness can rub against the steering shaft u-joint, causing wires to short circuit. This is a known design and routing flaw on this platform.
   How to confirm: Check if fuse 44 in the engine compartment fuse box is blown. Visually inspect the wiring harness located above the steering shaft u-joint (near the upper brake pedal mount) for signs of chafing, exposed wires, or damage. The damage may be on the back side of the harness and difficult to see without a mirror. The issue may only occur when the steering wheel is turned.
   Typical fix: Repair the damaged wires (solder and heat shrink is recommended) and insulate them with high-quality anti-abrasion tape (like Tesa cloth tape) or a protective loom. Secure the harness away from the steering shaft using zip ties to prevent future contact. This is a labor-intensive repair due to the tight location.
   Est. part cost: $10-$30
2. Failed Transmission Fluid Pressure (TFP) Sensor 'D' ⚪ Low Probability
   How to confirm: If the wiring harness is confirmed to be in perfect condition and fuse 44 is intact, the sensor circuit must be tested. This involves checking for correct voltage and resistance at the sensor connector and the PCM, a task best left to a professional.
   Typical fix: Replace the TFP sensor. This sensor is typically located on the transmission's valve body, requiring removal of the transmission oil pan for access.
   Est. part cost: $50-$150
3. Faulty Powertrain Control Module (PCM) Very Low Probability
   How to confirm: This is a diagnosis of last resort. The PCM is only condemned after all other possibilities, including wiring and sensors, have been exhaustively tested and ruled out. A persistent short from the harness could potentially damage the PCM, but it is not a common outcome.
   Typical fix: Replace and program the PCM.
   Est. part cost: $800-$1500

Diagnosis Steps

1. Scan for all Diagnostic Trouble Codes (DTCs). Note if multiple codes from different systems are present, which strongly suggests a shared power or ground issue.
2. Check fuse F44 in the engine compartment fuse box. If it is blown, this is a strong indicator of the short circuit described in Ford's TSBs.
3. Carefully inspect the 14290 engine wiring harness. Focus on the area directly above the steering shaft universal joint, near the top of the brake pedal assembly. Use a mirror and flashlight. Look for any signs of rubbing, chafing, or exposed copper wires. The damage is often on the side of the harness facing away from the technician.
4. If damage is found, disconnect the battery, repair the affected wires (splicing, soldering, and heat-shrinking is the preferred method), and wrap the section in protective anti-abrasion loom or high-quality electrical tape.
5. Secure the repaired harness away from the steering shaft using zip ties to create clearance and prevent future contact.
6. Replace the blown fuse 44, reconnect the battery, clear all DTCs, and start the vehicle. Turn the steering wheel lock-to-lock to ensure the fault does not return.
7. If and only if the harness is in perfect condition and fuse 44 is intact, proceed with standard electrical diagnosis of the TFP sensor 'D' circuit, checking for shorts, opens, and proper sensor operation.

Parts You'll Likely Need

• Wiring Harness Repair Materials — This is the most probable fix. The solution is to repair and protect the existing harness, not replace it.
  Trusted brands: 3M, Tesa (for anti-abrasion tape)
  OEM price range: $10-$30
  Aftermarket price range: $10-$30
• Transmission Fluid Pressure Sensor — This is the part the code directly refers to. It should only be replaced if the common wiring harness issue has been definitively ruled out.
  Trusted brands: Motorcraft
  OEM price range: $70-$150
  Aftermarket price range: $40-$90
• Engine Wiring Harness (OEM #PZ1Z-14290-L) — This is a worst-case scenario part, needed only if the harness is too damaged to be repaired. The part number varies by specific vehicle options (e.g., AWD vs FWD). The listed part number is for a 2023+ AWD model but is in the same family. Verifying the exact number with a dealer using the VIN is critical.
  Trusted brands: Motorcraft
  OEM price range: $750-$1200

Related Codes That Often Appear With This One

• P06A7 — This code relates to Sensor Reference Voltage 'B' Circuit Range/Performance. It often appears with P0847 because the chafed harness shorts out the shared voltage reference (VREF) circuit that powers multiple sensors.
• P2122 — Accelerator Pedal Position (APP) Sensor 'D' Circuit Low. The APP sensor is on the same VREF circuit and loses its power source from the same harness short.
• P0340 — Camshaft Position Sensor 'A' Circuit Malfunction. The camshaft sensor is another victim of the VREF circuit being shorted to ground by the damaged harness.
• Multiple other codes — TSBs SSM 50116 and SSM 50245 list over 20 possible codes that can be set by this single harness issue, affecting everything from fuel pressure to A/C clutch sensors.

Technical Service Bulletins (TSBs) & Recalls

• SSM 50116: Details the loss of VREF, blown fuse 44, and a long list of DTCs (including P0847) caused by the 14290 harness chafing on the steering shaft.
• SSM 50245: A similar bulletin also linking P0847 to a rough running condition, an open fuse 44, and a damaged electrical harness.

Platform-Specific Known Issues

• A primary documented issue for this vehicle is the engine wiring harness (14290) chafing against the steering shaft u-joint. This causes a short circuit on the Voltage Reference (VREF) circuit, which blows fuse 44 and sets P0847 along with numerous other codes. This is detailed in Ford TSBs SSM 50116 and SSM 50245.

Mechanic-Grade Diagnostic Values

• Transmission Solenoid Pressures (General Context) — expected: OEM-specific test values for the TFP 'D' sensor circuit are not published in publicly available documents. However, technicians monitoring related PIDs for the 8F35 transmission have reported solenoid pressures ranging from 1 PSI to over 190 PSI depending on the gear and operating conditions.. Failure: A 'Circuit High' code like P0847 indicates the PCM is seeing a sustained voltage above its expected threshold, which points to a short to power, not a pressure reading issue.

Scan Tool Commands That Help

• Ford IDS (Integrated Diagnostic System): Powertrain > Self-Test — To retrieve all manufacturer-specific DTCs from the PCM and TCM, which may provide more detail than a generic scanner.
• Ford IDS (Integrated Diagnostic System): Datalogger — To monitor live Parameter IDs (PIDs) for the TFP sensor circuit voltage, sensor reference voltage (VREF), and the status of other affected sensors in real-time. This can help confirm if the high voltage reading is constant or intermittent (e.g., only when turning the steering wheel).
• Ford IDS (Integrated Diagnostic System): Module Reprogramming — To update the PCM and/or TCM software. While no specific update explicitly mentions fixing the P0847 wiring issue, other TSBs for this transmission involve software updates to correct performance problems, making it a valid step after a repair to ensure the latest logic is installed.

Wiring & Ground Locations

• 14290 Harness Chafe Point — Engine wiring harness section located inside the cabin, directly above the intermediate steering shaft u-joint, near the upper brake pedal mount.. This is the specific, documented location where the harness rubs through, causing a short on the VREF circuit that triggers P0847 and blows fuse 44.
• Engine Compartment Fuse Box — Located under the hood.. This fuse box contains fuse F44, which is the primary fuse that blows due to the harness short circuit.
• Passenger Compartment Fuse Box — Located under the passenger side dashboard, below the glove box.. While not directly related to the P0847 cause, it's a key electrical location for general diagnosis.

OEM Part Supersession History

• Varies by VIN (e.g., LX6Z-14290-xx family) → Varies by VIN — Standard part updates and revisions.
  Heads up: The engine wiring harness (14290) is highly specific. Part numbers differ for FWD vs. AWD models and can change with model years. For example, PZ1Z-14290-L is for a 2023+ AWD model. Using a VIN to confirm the exact part number with a Ford dealer is mandatory if a full harness replacement is considered.

Model Year Variations Within This Range

• 2019-2021 (build date dependent): A TSB for the 8F35 transmission family notes that models built on or before 20-Dec-2021 may be prone to internal wear of the output planet carrier assembly, leading to various transmission faults.
• 2019-2021 (build date dependent): Ford has issued PCM software updates for certain build ranges to address other transmission issues like shuddering. This indicates that software logic is not uniform across all 2020-2022 models.

Diagnostic Flowchart

Other Known Issues on This Vehicle

Issues unrelated to this code that are worth knowing about as an owner of this generation:

• Cracked Fuel Injector 🔴 High — Common enough to trigger multiple recalls (e.g., 22V859). Can occur at various mileages. (Ref: Recall 22V859, 24V187. A cracked injector can leak fuel into the engine bay, creating a significant fire risk.)
• Engine Oil Separator Housing Crack 🔴 High — Widespread enough to cause a recall (22V191) for approximately 345,450 vehicles. (Ref: Recall 22V191. The housing can crack and leak oil, which increases the risk of an engine fire.)
• Engine Coolant Intrusion 🔴 High — This was a well-documented problem on the previous generation 1.5L I4 engine (2017-2019). While the 2020+ 1.5L is a different I3 engine design, owners should be aware of the history. Reports for the newer engine are less frequent but still exist. (Ref: Lawsuits and TSBs (like 22-2229 for the 2.0L) exist for other EcoBoost engines with this issue.)
• 8F35 Transmission Problems 🟠 Medium — Owners report harsh shifting, shuddering, and occasional premature failure. Dealerships report long wait times for transmission repairs. (Ref: Various TSBs exist for the 8F35 transmission, such as 21-2081 for shuddering and 22-2281 for slipping/harsh engagement, though these may apply to different vehicle models.)

Used vs. New Parts: Buying Guide for This Vehicle

When a used part is the smart pick: For this specific code, a used part is generally not recommended. The primary fix is a repair of the existing wiring harness using new materials (wire, solder, tape). A used Transmission Fluid Pressure sensor could be considered, but since the sensor is rarely the cause, it is not a practical area for savings.

Donor-vehicle mileage cap: roughly under 80000 miles for the part to have meaningful remaining life.

What to inspect on the donor part:

• If considering a used sensor, ensure the donor vehicle had no transmission-related trouble codes.
• Visually inspect the sensor's plastic connector for any cracks, brittleness, or signs of heat damage.
• Never purchase a used engine wiring harness, as it may have the same hidden chafing defect or other unknown damage from the donor vehicle.

OEM-only on this vehicle (don't cheap out):

• Engine Wiring Harness (if replacement is necessary instead of repair)

Aftermarket brands forum-validated for this vehicle:

• Tesa (for anti-abrasion cloth harness tape)

Brands owners have reported issues with on this vehicle:

• Unknown/unbranded online marketplace sensors. Given the low probability of sensor failure, it's not worth introducing a low-quality part.

Real Owner Stories

Aggregated from forums and TSBs cited above. Mileages and costs reflect what owners reported in those sources.

Related OBD-II Codes

• VREF — Not a code itself, but SSM 50116 notes that P0847 often appears with a long list of DTCs caused by a loss of the Voltage Reference (VREF) circuit when fuse 44 blows.
• P0842 — Often associated with TFP sensor circuit issues or VREF circuit shorts caused by the 14290 harness chafing on the steering shaft.
• P0700 — A general transmission control system malfunction code that may trigger alongside P0847 when the vehicle enters limp mode or experiences harsh shifting.
• U0100 — Communication code that can occur if the wiring harness short circuit affects the PCM's ability to communicate with other modules.

Frequently Asked Questions