Quick Answer
P0987 means: DTC P0987 indicates a transmission fluid temperature sensor problem.
Can I drive with P0987? Immediate attention is recommended to prevent transmission damage.
Common Questions
What does P0987 mean and how does it affect my car?
The P0987 code signifies a transmission fluid temperature sensor issue. This can lead to poor transmission performance, such as rough shifting and overheating, which can ultimately result in costly repairs if not addressed promptly.
What are the most common causes of P0987 and how much does it cost to fix?
Common causes include a faulty temperature sensor, damaged wiring, or low transmission fluid. Repair costs can range from $100 for wiring repairs to $300 for sensor replacements, depending on the specific issue.
Can I drive my car with P0987 or should I stop immediately?
It is advisable to avoid driving the vehicle until the issue is resolved. Driving with this code can lead to transmission overheating and severe damage, which could result in a complete transmission failure.
How can I diagnose P0987 myself using GeekOBD APP?
To diagnose P0987 with the GeekOBD APP, connect the device to your vehicle's OBD2 port, run a complete scan for trouble codes, and review any related freeze-frame data for context on the issue.
What vehicles are most commonly affected by P0987?
Vehicles like the 2015-2020 Ford F-150 and 2016-2020 Chevrolet Silverado frequently experience the P0987 code due to their transmission system designs.
How can I prevent P0987 from happening again?
Regular maintenance, including transmission fluid changes and inspections, can help prevent P0987. Ensure that wiring connections are checked during routine service to catch any potential issues early.
What is P0987?
The diagnostic trouble code (DTC) P0987 indicates a problem with the transmission fluid temperature sensor circuit, specifically relating to a range or performance issue. This sensor is crucial for monitoring the temperature of the transmission fluid, which is vital for optimal transmission performance. When the transmission fluid gets too hot, it can cause serious damage to the transmission, leading to costly repairs. Typically found in various vehicles, including the Ford F-150 and Chevrolet Silverado, this code can be triggered by several factors, including a malfunctioning sensor, damaged wiring, or poor electrical connections. In everyday terms, if you see this code pop up, it means that your vehicle's computer has detected that the transmission fluid temperature is outside the expected range, which can lead to inefficient shifting, slipping gears, and ultimately, transmission failure. Ignoring this code can result in extensive damage, impacting vehicle performance and safety. Therefore, addressing this issue promptly is crucial for maintaining your vehicle's reliability and performance.
System: P - Powertrain (Engine, Transmission, Emissions)
Symptoms
Common symptoms when P0987 is present:
- The check engine light remains illuminated, indicating an issue that requires immediate attention.
- Drivers may experience rough or erratic shifting while driving, leading to a bumpy ride and potential safety issues.
- Fuel economy may decrease by 10-20% due to inefficient transmission operation, impacting your budget in the long run.
- Slipping gears can occur, where the vehicle unexpectedly changes gears or loses power during acceleration.
- Overheating of the transmission can be noticeable, with burnt smells or unusual noises indicating potential damage.
Possible Causes
Most common causes of P0987 (ordered by frequency):
- {'cause': 'Faulty transmission fluid temperature sensor - 40% likelihood. This is the most common cause, where the sensor fails to provide accurate readings to the engine control module (ECM).', 'details': 'A malfunctioning sensor can lead to incorrect temperature readings, causing the transmission to operate improperly.'}
- {'cause': 'Damaged wiring or connectors - 25% likelihood. Wiring issues can disrupt the signal between the sensor and the ECM.', 'technicalExplanation': 'Corrosion, fraying, or loose connections can prevent the sensor from relaying accurate temperature data.'}
- {'cause': 'Software issues - 15% likelihood. In some cases, outdated or faulty software in the ECM can cause erroneous readings.', 'preventionTip': "Regularly update your vehicle's software and perform diagnostics to catch these issues early."}
- {'cause': 'Low transmission fluid - 10% likelihood. Insufficient fluid can lead to overheating, affecting temperature readings.', 'seriousness': 'Running low on transmission fluid can severely damage the transmission and lead to costly repairs.'}
- {'cause': 'Mechanical failure in transmission - 10% likelihood. Internal issues can lead to overheating and sensor misreading.', 'possibleCause': 'Worn-out parts or failure of the torque converter can lead to erratic behavior.'}
P0987 Repair Costs
Cost Breakdown by Repair Type
Transmission Fluid Temperature Sensor Replacement
Replacing a faulty sensor with a new OEM part.
- Total: $150 - $300
- Success rate: 90%
Wiring Repair
Repairing or replacing damaged wiring or connectors.
- Total: $100 - $250
- Success rate: 85%
Transmission Fluid Change
Changing low or degraded transmission fluid as a preventive measure.
- Total: $100 - $200
- Success rate: 75%
Money-Saving Tips for P0987
- 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 P0987 Diagnosis Process
Follow these systematic steps to accurately diagnose P0987. 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 frayed wires or poor connections.
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 will help in assessing the overall health of the transmission system.
Step 3: Step 3: Component testing - Use a multimeter to test the voltage and resistance of the transmission fluid temperature sensor (20-30 minutes)
Step 3: Component testing - Use a multimeter to test the voltage and resistance of the transmission fluid temperature sensor (20-30 minutes). This step will help confirm whether the sensor is functioning correctly.
Step 4: Step 4: System function test - After repairs, verify the proper operation of the transmission and clear codes using the GeekOBD APP (10-15 minutes)
Step 4: System function test - After repairs, verify the proper operation of the transmission and clear codes using the GeekOBD APP (10-15 minutes). Monitor for any reoccurrence of the code.
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to ensure the issue has been resolved (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to ensure the issue has been resolved (15-20 minutes). Pay attention to shifting behavior and any unusual noises.
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 Fluid Temperature Sensor Replacement on a 2018 Ford F-150
Vehicle: 2018 Ford F-150, 45,000 miles
Problem: Customer reported rough shifting and check engine light illumination.
Diagnosis: Diagnostic scan revealed P0987 code. Visual inspection showed damaged wiring to the sensor.
Solution: Replaced the transmission fluid temperature sensor and repaired the damaged wiring.
Cost: $250 (sensor $150, wiring repair $100)
Result: After repairs, customer reported smooth shifting and no further check engine light.
Case Study 2: Wiring Repair on a 2017 Chevrolet Silverado
Vehicle: 2017 Chevrolet Silverado, 60,000 miles
Problem: Check engine light was on, and the vehicle hesitated during acceleration.
Diagnosis: P0987 code was confirmed, and inspection found corroded connections.
Solution: Repaired corrosion and replaced connectors leading to the temperature sensor.
Cost: $175 (wiring repair $75, connectors $100)
Result: Customer noted improved performance and no more warning lights.