P0847 Buick Code - Transmission Fluid Pressure Switch 2 Circuit Low Voltage
Quick Answer
The transmission fluid pressure switch, also known as the pressure switch manifold, is a multiple switch assembly made up of 3 normally open pressure switches and 1 normally closed pressure switch. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve Assembly. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0847 Buick indicates Transmission Fluid Pressure Switch 2 Circuit Low Voltage.
- Common causes
- Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve Assembly.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0847 Buick Description
What are the Possible Causes of the DTC P0847 Buick?
- Low transmission fluid level
- Dirty transmission fluid
- Faulty Transmission Control Solenoid Valve Assembly
- Transmission Control Solenoid Valve Assembly harness is open or shorted
- Transmission Control Solenoid Valve Assembly circuit poor electrical connection
- Faulty Transmission Control Module (TCM)
How to Fix the DTC P0847 Buick?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0847 Buick code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0847 Buick Code
1. What does the OBDII code P0847 mean on a Buick?
Code P0847 indicates that the transmission control module (TCM) has detected low voltage in the transmission fluid pressure switch 2 circuit.
2. What are the common symptoms of code P0847 in a Buick?
Symptoms may include harsh or delayed shifting, transmission slipping, reduced fuel efficiency, the vehicle going into limp mode, and the illumination of the check engine light.
3. What causes the P0847 code to appear in a Buick?
Common causes include a faulty transmission fluid pressure switch, low transmission fluid levels, contaminated fluid, damaged wiring or connectors in the pressure switch circuit, or a malfunctioning transmission control module.
4. How can I diagnose code P0847 on my Buick?
Start by checking the transmission fluid level and condition, inspecting the wiring and connectors for damage, and testing the transmission fluid pressure switch with a multimeter. A scan tool can also help monitor live data from the TCM.
5. Can I drive my Buick with code P0847?
Driving with this code is not recommended, as it may cause further damage to the transmission. It's best to address the issue promptly to avoid costly repairs.
6. How do I fix code P0847 on my Buick?
Repairs may include replacing the transmission fluid pressure switch, repairing or replacing damaged wiring, cleaning dirty connectors, refilling or flushing the transmission fluid, or reprogramming the TCM if necessary.
7. How much does it cost to repair a P0847 code on a Buick?
The cost depends on the exact cause. Replacing the transmission fluid pressure switch typically costs between $100 and $300, while wiring repairs or fluid flushes may vary.
8. Can low transmission fluid cause the P0847 code?
Yes, low or contaminated transmission fluid can cause insufficient pressure, triggering the P0847 code.
9. What happens if I ignore the P0847 code in my Buick?
Ignoring the code can lead to worsening transmission performance, additional component damage, and higher repair costs over time.
10. Can a faulty TCM cause the P0847 code?
Yes, a malfunctioning transmission control module can misinterpret or fail to process data from the pressure switch, leading to the P0847 code.
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