C0851 - DTC C0851 - Steering Angle Sensor Input Circuit Malfunction in Popular Vehicles

Quick Answer

C0851 means: C0851 indicates a malfunction in the steering angle sensor circuit, affecting vehicle stability.

Fix: Check and replace faulty components Cost: $150 - $300 Time: 90-180 minutes

Can I drive with C0851? Immediate attention is recommended to avoid safety risks.

Common Questions

What does C0851 mean and how does it affect my car?

The C0851 code signifies a problem with the steering angle sensor input circuit. This issue can lead to compromised vehicle stability and handling, as the sensor is crucial for systems like traction control and ABS. If not addressed, it could result in further damage and safety risks.

What are the most common causes of C0851 and how much does it cost to fix?

The primary cause of C0851 is often a faulty steering angle sensor, typically costing between $150 and $300 to replace. Other causes include wiring issues or an ABS control module malfunction, which can vary in repair costs from $50 to $200 depending on the extent of the damage.

Can I drive my car with C0851 or should I stop immediately?

It's advisable to avoid driving your vehicle if the C0851 code is active. Continuing to drive can compromise handling and safety, potentially leading to accidents. It's best to have this issue diagnosed and repaired as soon as possible.

How can I diagnose C0851 myself using GeekOBD APP?

To diagnose C0851 using the GeekOBD APP, connect your OBD-II scanner and run a diagnostic scan. The app will display the code and any related codes for further insights. You can also view freeze frame data to understand the conditions under which the code was triggered.

What vehicles are most commonly affected by C0851?

The C0851 code frequently appears in vehicles like the 2010-2015 Ford Fusion, 2013-2018 Dodge Dart, and 2007-2011 Chevrolet Malibu, among others. Always check for any recalls or technical service bulletins (TSBs) related to these models.

How can I prevent C0851 from happening again?

To prevent C0851, ensure regular maintenance of your vehicle’s electrical and steering systems. This includes periodic inspections of wiring and connectors, keeping the steering system clean, and addressing any warning lights promptly.

What is C0851?

The diagnostic trouble code (DTC) C0851 indicates a malfunction in the steering angle sensor input circuit. This sensor is crucial for the stability control and anti-lock braking systems (ABS) in your vehicle. When it malfunctions, it can lead to various issues, including compromised vehicle handling and safety. The steering angle sensor provides data to the vehicle's electronic control unit (ECU) about the position of the steering wheel. If the ECU detects an unexpected or incorrect reading from this sensor, it triggers the C0851 code. This code is commonly found in a range of vehicles, including the 2010-2015 Ford Fusion and 2013-2018 Dodge Dart. If you are experiencing symptoms like the traction control light activating or difficulties in steering response, it’s crucial to address this issue promptly. Ignoring it could lead to more severe problems over time, such as increased wear on your tires and suspension components. Understanding this code and its implications can help you maintain your vehicle’s safety and performance.

System: C - Chassis (ABS, Steering, Suspension)

Symptoms

Common symptoms when C0851 is present:

The traction control light illuminates on the dashboard, indicating a possible issue with the vehicle's stability systems.
Steering feels unresponsive or has a delayed reaction when turning, which can make driving difficult.
The vehicle may experience uneven tire wear due to improper alignment caused by sensor malfunction.
ABS warning light may also appear, signaling potential issues with the braking system's performance.
In some cases, the vehicle may enter limp mode, reducing engine power to prevent further damage.

Possible Causes

Most common causes of C0851 (ordered by frequency):

The most common cause of the C0851 code is a faulty steering angle sensor, with a likelihood of about 60%. This sensor can wear out over time or be damaged in accidents.
Another frequent cause is damaged wiring or poor connections in the steering sensor circuit, which can lead to incorrect readings sent to the ECU.
A third potential cause is a malfunctioning ABS control module, which can misinterpret signals from the steering angle sensor.
Less commonly, issues with the vehicle’s power supply, such as a weak battery or faulty alternator, can affect sensor performance.
In rare cases, software glitches in the vehicle's ECU could trigger false readings, requiring a software update or reprogramming.

C0851 Repair Costs

Cost Breakdown by Repair Type

Steering Angle Sensor Replacement

Replacing the faulty steering angle sensor, which is the primary cause of the C0851 code.

Total: $150 - $300
Success rate: 90%

Wiring Repair

Repairing or replacing damaged wiring or connectors in the sensor circuit.

Total: $50 - $200
Success rate: 80%

Money-Saving Tips for C0851

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 C0851 Diagnosis Process

Follow these systematic steps to accurately diagnose C0851. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Check for any obvious signs of damage, such as frayed wires or loose connectors in the steering angle sensor circuit (5-10 minutes)

Step 1: Initial visual inspection - Check for any obvious signs of damage, such as frayed wires or loose connectors in the steering angle sensor circuit (5-10 minutes).