P1857 Code - Transfer Case Contact Plate 'C' Short Circuit To Ground
Quick Answer
The diagnostic trouble code P1857 indicates a Transfer Case Contact Plate 'C' Short Circuit To Ground. Common causes include Damaged or corroded wiring connections leading to the transfer case contact plate, Faulty transfer case contact plate 'C', Water or debris intrusion causing a short circuit. 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
- P1857 indicates Transfer Case Contact Plate 'C' Short Circuit To Ground.
- Common causes
- Common causes include Damaged or corroded wiring connections leading to the transfer case contact plate, Faulty transfer case contact plate 'C', Water or debris intrusion causing a short circuit.
- 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.
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Code P1857 Description
The diagnostic trouble code P1857 indicates a Transfer Case Contact Plate 'C' Short Circuit To Ground. This code is typically found in vehicles equipped with all-wheel drive or four-wheel drive systems that have a transfer case. The transfer case contact plate 'C' is a component that is responsible for sending signals to the vehicle's control module to engage or disengage the transfer case, allowing the vehicle to switch between two-wheel drive and four-wheel drive modes.
Common Causes of P1857
- Damaged or corroded wiring connections leading to the transfer case contact plate.
- Faulty transfer case contact plate 'C'.
- Water or debris intrusion causing a short circuit.
- Electrical issues within the transfer case control module.
- Poor ground connection in the transfer case system.
Symptoms of P1857
- Difficulty shifting between two-wheel drive and four-wheel drive modes.
- Transfer case not engaging or disengaging properly.
- Illumination of the 4WD warning light on the dashboard.
- Unusual noises coming from the transfer case area.
- Reduced traction or stability while driving in slippery conditions.
How to Fix P1857
- Begin by conducting a thorough visual inspection of the wiring connections leading to the transfer case contact plate 'C' to check for any damage or corrosion. Repair or replace any damaged wiring as needed.
- Test the transfer case contact plate 'C' for proper functionality using a multimeter to determine if it is shorted to ground. Replace the contact plate if necessary.
- Inspect the transfer case control module for any signs of water intrusion or electrical issues. Address any faults found in the control module.
- Clear the diagnostic trouble code from the vehicle's system using a scan tool after completing the repairs.
- Test drive the vehicle to ensure that the transfer case is engaging and disengaging correctly in all drive modes.
Cost to Fix P1857
The typical repair costs for addressing a Transfer Case Contact Plate 'C' Short Circuit To Ground issue can vary depending on the extent of the damage and the specific components that need to be replaced. In general, the cost of parts for a new transfer case contact plate 'C' can range from $100 to $300, while labor costs at an auto repair shop may add an additional $150 to $300. Overall, the total repair cost for this issue could amount to approximately $250 to $600. It is important to note that these estimates are rough figures, and actual costs may vary based on factors such as location, vehicle make and model, and labor rates at the repair facility. It is recommended to obtain a detailed quote from a trusted auto repair shop to get a more accurate cost estimate for this repair.
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Code P1857 Information for Specific Makes
- P1857 Audi — Load Signal Error Message From ECU
- P1857 Ford — Transfer Case Contact Plate 'C' Short Circuit To Ground
- P1857 Lincoln — Transfer Case Contact Plate 'C' Short Circuit To Ground
- P1857 Mercury — Transfer Case Contact Plate 'C' Short Circuit To Ground
- P1857 Mitsubishi — Odd Number Gear Axle Interlock
- P1857 Volkswagen — Load Signal Error Message From ECU
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