P0878 2014 Chevrolet Silverado Code - Transmission Fluid Pressure Switch 4 Circuit High Voltage
Quick Answer
The Transmission Fluid Pressure (TFP) switch 4 is part of the Transmission Control Solenoid Valve Assembly which has no serviceable parts. 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
- P0878 2014 Chevrolet Silverado indicates Transmission Fluid Pressure Switch 4 Circuit High 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 P0878 2014 Chevrolet Silverado Description
What are the Possible Causes of the DTC P0878 2014 Chevrolet Silverado?
- 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
How to Fix the DTC P0878 2014 Chevrolet Silverado?
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 P0878 2014 Chevrolet Silverado 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 P0878 2014 Chevrolet Silverado Code
1. What does the OBDII code P0878 mean for a 2014 Chevrolet Silverado?
P0878 indicates that the Transmission Fluid Pressure (TFP) Switch 4 Circuit is experiencing high voltage, which can suggest an issue with the transmission's hydraulic system or electrical components.
2. What are the common symptoms of code P0878 in a 2014 Silverado?
Symptoms may include erratic shifting, the transmission stuck in one gear, the Check Engine Light illuminated, and possibly reduced fuel efficiency.
3. What causes the P0878 code to appear in a Chevrolet Silverado?
Common causes include a malfunctioning TFP switch, wiring issues such as short circuits, a damaged transmission control module (TCM), or low or dirty transmission fluid.
4. Can dirty transmission fluid trigger the P0878 code?
Yes, low or contaminated transmission fluid can lead to improper pressure readings, potentially triggering the P0878 code.
5. How do you diagnose the P0878 code in a 2014 Silverado?
Diagnosing involves scanning for codes, inspecting the TFP switch and related wiring for damage, checking the transmission fluid level and condition, and testing the TCM for proper operation.
6. Is it safe to drive a 2014 Silverado with the P0878 code?
Driving with the P0878 code is not recommended as it can lead to further transmission damage or unsafe driving conditions due to erratic shifting.
7. How is the P0878 code repaired in a 2014 Silverado?
Repairs may involve replacing the TFP switch, repairing or replacing damaged wiring, flushing and refilling the transmission fluid, or reprogramming or replacing the TCM if necessary.
8. What tools are needed to fix a P0878 code?
Tools may include an OBDII scanner, a multimeter for electrical testing, basic hand tools, and possibly a transmission fluid flush kit.
9. How much does it cost to fix the P0878 code in a Chevrolet Silverado?
Repair costs vary, but replacing a TFP switch can range from $150 to $400, while resolving wiring or TCM issues can increase costs.
10. Can a faulty TCM cause the P0878 code?
Yes, a malfunctioning Transmission Control Module can send incorrect signals, leading to high voltage readings in the TFP switch circuit.
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