P0989 - Transmission Range Sensor Performance Issue in 2015-2019 Jeep Grand Cherokee and Similar Models

Quick Answer

P0989 means: P0989 indicates a malfunction with the transmission range sensor, affecting gear shifting.

Fix: Check and replace faulty components Cost: $150 - $400 Time: 90-180 minutes

Can I drive with P0989? Address immediately to avoid further transmission damage.

Common Questions

What does P0989 mean and how does it affect my car?

The P0989 code indicates a malfunction with the transmission range sensor, which is essential for your vehicle's automatic transmission. If this sensor fails, you may experience poor shifting, hesitation during acceleration, and even stalling. Long-term neglect of this issue can lead to severe transmission damage, resulting in costly repairs.

What are the most common causes of P0989 and how much does it cost to fix?

Common causes include a faulty transmission range sensor (65% likelihood) and damaged wiring (20%). Repair costs can range from $150 to over $1,500 depending on whether a simple sensor replacement or a more complex ECM repair is required.

Can I drive my car with P0989 or should I stop immediately?

While you may be able to drive your vehicle, it is not advisable. Ignoring the P0989 code can lead to severe transmission issues and may put you at risk of stalling or losing power unexpectedly. It's best to address this code as soon as possible.

How can I diagnose P0989 myself using GeekOBD APP?

Using the GeekOBD APP, you can perform an OBD2 scan to retrieve the P0989 code, along with any related codes. The app can provide freeze frame data to help you understand the conditions under which the fault occurred. From there, you can visually inspect wiring and connections and check the sensor's voltage using a multimeter.

What vehicles are most commonly affected by P0989?

DTC P0989 is commonly found in vehicles such as the 2015-2019 Jeep Grand Cherokee, 2016-2018 Dodge Charger, and various models from Chrysler. Be sure to check for any recalls or technical service bulletins related to this code.

How can I prevent P0989 from happening again?

Regular maintenance is key to preventing P0989. Ensure electrical connections are clean and tight, and conduct periodic inspections of the transmission range sensor and surrounding wiring. Additionally, keeping your vehicle's software updated can help prevent electronic issues.

What is P0989?

The DTC P0989 code indicates a problem with the transmission range sensor, which is crucial for determining the gear position of your vehicle. This sensor plays a vital role in the vehicle's automatic transmission system by providing information about the position of the gear selector. If the transmission range sensor is malfunctioning, it can lead to improper shifting, stalling, or even complete failure to engage the transmission. Drivers may experience symptoms like the engine hesitating during acceleration, a constant check engine light, or rough shifting. Additionally, the vehicle may enter limp mode to prevent further damage, limiting its performance. The P0989 code is often triggered by electrical issues such as damaged wiring or faulty connections, but it can also stem from the sensor itself being worn out or defective. For many drivers, ignoring this code can lead to extensive transmission problems and higher repair costs down the line, sometimes reaching up to $1,500 if a full transmission replacement is required. Therefore, addressing the P0989 code promptly is essential for maintaining your vehicle's performance and reliability.

System: P - Powertrain (Engine, Transmission, Emissions)

Symptoms

Common symptoms when P0989 is present:

  • Check engine light stays on constantly, indicating a persistent issue with the transmission.
  • Engine hesitates during acceleration, causing a delay in power delivery and affecting driving comfort.
  • Fuel economy decreased by 10-15%, which can lead to increased fuel expenses over time.
  • Rough shifting or slippage during gear changes, making the driving experience less smooth.
  • Occasional failure to start, as the vehicle may not recognize the correct gear position.

Possible Causes

Most common causes of P0989 (ordered by frequency):

  1. Faulty transmission range sensor is the most common cause, with a likelihood of about 65%. This sensor may wear out over time or suffer from internal failure.
  2. Damaged wiring or loose connections can also trigger the P0989 code, accounting for approximately 20% of cases. Corrosion or frayed wires can disrupt the signal to the engine control module (ECM).
  3. Improper installation during previous repairs or replacements may lead to sensor misalignment, accounting for around 10%. Always ensure professional installation.
  4. Less common but serious causes include a malfunctioning engine control module (ECM), which can misinterpret sensor signals.
  5. Rarely, issues with the transmission control module (TCM) may cause the fault, necessitating a specialized diagnosis.

P0989 Repair Costs

Cost Breakdown by Repair Type

Transmission Range Sensor Replacement

Replacing the faulty transmission range sensor with a new unit.

  • Total: $150 - $400
  • Success rate: 90%
Wiring Repair

Repairing or replacing damaged wiring related to the transmission range sensor.

  • Total: $100 - $300
  • Success rate: 80%
ECM Reprogramming or Replacement

Reprogramming or replacing the engine control module if it is faulty.

  • Total: $500 - $1,500
  • Success rate: 70%
Money-Saving Tips for P0989
  • Start with the most common and least expensive repairs first
  • Use GeekOBD APP to confirm diagnosis before replacing expensive parts
  • Consider preventive maintenance to avoid future occurrences
  • Compare prices for OEM vs aftermarket parts based on your needs
  • Address the issue promptly to prevent more expensive secondary damage

Diagnostic Steps

Professional P0989 Diagnosis Process

Follow these systematic steps to accurately diagnose P0989. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes). Look for any frayed wires connecting to the transmission range sensor.

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes). This app can provide more insights into the vehicle's health.

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Component testing - Use a multimeter to test the voltage and resistance of the transmission range sensor (20-30 minutes)

Step 3: Component testing - Use a multimeter to test the voltage and resistance of the transmission range sensor (20-30 minutes). Compare readings against the manufacturer's specifications.

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: System function test - After repairs, verify the proper operation of the transmission system and clear codes with your diagnostic tool (10-15 minutes)

Step 4: System function test - After repairs, verify the proper operation of the transmission system and clear codes with your diagnostic tool (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure the problem is resolved (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure the problem is resolved (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

Important Notes

  • Always verify the repair with GeekOBD APP after completing diagnostic steps
  • Clear codes and test drive to ensure the problem is resolved
  • Address underlying causes to prevent code recurrence

Real Repair Case Studies

Case Study 1: Transmission Range Sensor Replacement on a 2017 Jeep Grand Cherokee

Vehicle: 2017 Jeep Grand Cherokee, 80,000 miles

Problem: Customer reported check engine light and rough shifting.

Diagnosis: An OBD2 scan revealed the P0989 code. A visual inspection showed corroded wiring.

Solution: Replaced the transmission range sensor and repaired wiring harness.

Cost: $350 (parts: $150, labor: $200)

Result: Post-repair road test confirmed smooth shifting and no check engine light.

Case Study 2: Wiring Repair on a 2016 Dodge Charger

Vehicle: 2016 Dodge Charger, 65,000 miles

Problem: Engine hesitating during acceleration and intermittent check engine light.

Diagnosis: The GeekOBD APP scan indicated P0989. Further inspection revealed damaged wiring.

Solution: Repaired the damaged wiring and reconnected the sensor.

Cost: $200 (parts: $50, labor: $150)

Result: Vehicle ran smoothly post-repair with no further issues.

Diagnose P0989

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: P0989
System: Powertrain (Engine, Transmission, Emissions)
Severity: HIGH
Category: Engine Codes