AutoCodes – Generic – C1855

C1855 Code - Acceleration Position Sensor Conflict

Quick Answer

The Anti-Lock Brake System (ABS) Module monitors the Acceleration Position Sensor. Common causes include Faulty Acceleration Position Sensor, Acceleration Position Sensor harness is open or shorted, Acceleration Position Sensor circuit poor electrical connection. 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: C1855 indicates Acceleration Position Sensor Conflict.
Common causes: Common causes include Faulty Acceleration Position Sensor, Acceleration Position Sensor harness is open or shorted, Acceleration Position Sensor circuit poor electrical connection.
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 Popularity 3,862

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Dec 02, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1855 Description

The Anti-Lock Brake System (ABS) Module monitors the Acceleration Position Sensor. The ABS Module sets the OBDII code when the Acceleration Position Sensor is not to factory specifications.

OBDII Code C1855 - Acceleration Position Sensor Conflict - AutoCodes.com — C1855 Code - Acceleration Position Sensor Conflict

What does this mean?

What are the Possible Causes of the DTC C1855?

Faulty Acceleration Position Sensor
Acceleration Position Sensor harness is open or shorted
Acceleration Position Sensor circuit poor electrical connection

How to Fix the DTC C1855?

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 C1855 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.

Need more information about the C1855 code?

Need more information on how to fix the C1855 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1855 code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C1855 Code

1. What are the common symptoms of OBDII code C1855 (Acceleration Position Sensor Conflict)?

- Common symptoms include issues with acceleration responsiveness, unstable engine performance, and potential stalling while driving.

2. What causes the OBDII code C1855 to occur?

- The code C1855 is typically triggered by conflicts or discrepancies between the signals from different acceleration position sensors in the vehicle.

3. How can I diagnose the OBDII code C1855?

- Diagnosis involves using a professional OBDII scanner to read the code, inspecting the acceleration position sensors, and checking for any wiring or connection issues.

4. Can a faulty accelerator pedal position sensor cause the OBDII code C1855?

- Yes, a faulty accelerator pedal position sensor can contribute to triggering the C1855 code due to conflicts with other acceleration position sensors.

5. What are the recommended repair tips for resolving the OBDII code C1855?

- Repair tips may include recalibrating or replacing the acceleration position sensors, ensuring proper wiring connections, and clearing the error code with a diagnostic tool.

6. Is it safe to continue driving with the OBDII code C1855 present?

- It is not recommended to drive with the C1855 code active, as it can lead to potential safety hazards and further damage to the vehicle's engine system.

7. Can a DIY enthusiast resolve the OBDII code C1855 issue at home?

- Depending on the skill level and access to necessary tools, some DIY enthusiasts may be able to address the C1855 code by following repair guides or seeking professional advice.

8. Are there any recalls or technical service bulletins related to the OBDII code C1855?

- It is advisable to check with the vehicle manufacturer or authorized service centers for any recalls or technical service bulletins related to the C1855 code for specific vehicle models.

9. How can I prevent the OBDII code C1855 from recurring in the future?

- Regular maintenance, timely sensor inspections, and addressing any acceleration-related issues promptly can help prevent the recurrence of the C1855 code.

10. Will resetting the OBDII system clear the C1855 code permanently?

- Resetting the OBDII system may temporarily clear the C1855 code, but if the underlying issue causing the code is not addressed, it is likely to reappear.