C1421 Code - Open or Short in Master Cylinder Pressure Sensor
Quick Answer
The Master Cylinder Pressure Sensor is connected to the Skid Control ECU (Brake Actuator Assembly). Common causes include Faulty Brake Actuator Assembly (Master Cylinder Pressure Sensor), Brake Actuator Assembly harness is open or shorted, Brake Actuator Assembly 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
- C1421 indicates Open or Short in Master Cylinder Pressure Sensor.
- Common causes
- Common causes include Faulty Brake Actuator Assembly (Master Cylinder Pressure Sensor), Brake Actuator Assembly harness is open or shorted, Brake Actuator Assembly 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.
Code C1421 Description
What are the Possible Causes of the DTC C1421?
- Faulty Brake Actuator Assembly (Master Cylinder Pressure Sensor)
- Brake Actuator Assembly harness is open or shorted
- Brake Actuator Assembly circuit poor electrical connection
How to Fix the DTC C1421?
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 C1421 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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Get the C1421 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- C1421 Chrysler — Rear Differential Clutch Performance
- C1421 Dodge — Rear Differential Clutch Performance
- C1421 Jeep — Rear Differential Clutch Performance
- C1421 Lexus — Open or Short in Master Cylinder Pressure Sensor
- C1421 Scion — Open or Short in Master Cylinder Pressure Sensor
- C1421 Toyota — Open or Short in Master Cylinder Pressure Sensor
Frequently Asked Questions about C1421 Code
1. What are the common symptoms of OBDII code C1421 related to an open or short in the master cylinder pressure sensor?
- Common symptoms include the illumination of the check engine light, issues with the brake system, and potential loss of brake functionality.
2. What are the possible causes of OBDII code C1421 indicating an open or short in the master cylinder pressure sensor?
- Causes may include damaged wiring or connectors, a faulty master cylinder pressure sensor, or issues with the brake system's electrical circuit.
3. How can I diagnose the source of OBDII code C1421 for an open or short in the master cylinder pressure sensor?
- Diagnose the code by inspecting the wiring and connectors for damage, testing the master cylinder pressure sensor for functionality, and checking the brake system's electrical circuit.
4. Can I continue driving my vehicle with OBDII code C1421 indicating an open or short in the master cylinder pressure sensor?
- It is not recommended to drive the vehicle with this code as it may lead to brake system malfunctions, compromising your safety on the road.
5. How can I repair OBDII code C1421 related to an open or short in the master cylinder pressure sensor?
- Repair options include fixing or replacing damaged wiring and connectors, replacing the faulty master cylinder pressure sensor, or addressing any issues with the brake system's electrical circuit.
6. Will resetting the OBDII code C1421 for an open or short in the master cylinder pressure sensor solve the issue?
- Resetting the code may temporarily turn off the check engine light, but it will not fix the underlying problem causing the open or short in the master cylinder pressure sensor.
7. Are there any safety precautions I should take when working on OBDII code C1421 associated with the master cylinder pressure sensor?
- When working on the brake system or electrical components, always follow proper safety procedures, use caution, and consider seeking professional assistance if needed.
8. How much does it typically cost to repair OBDII code C1421 concerning an open or short in the master cylinder pressure sensor?
- Repair costs can vary depending on the specific issue, parts needed, and labor rates, so it's advisable to consult a mechanic for an accurate estimate.
9. Can a DIY enthusiast with automotive experience fix OBDII code C1421 related to the master cylinder pressure sensor issue?
- Depending on the individual's skill level and experience, some DIY enthusiasts may be able to diagnose and repair this code, but caution is advised when working on brake system components.
10. Is it necessary to have the OBDII code C1421 cleared by a mechanic after repairing the issue with the master cylinder pressure sensor?
- It is recommended to have the code cleared by a mechanic or using an OBDII scanner to ensure the issue has been properly addressed and the check engine light is reset.
Discuss the causes and fixes for C1421 OBDII Code
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2012 Should still be under warranty. You should take it to the dealer. Unfortunately it's too new and we don't have the information for that year yet.
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Please My rav4 came up with c1201 and c1421 and within 5 minutes of the scan the vehicle stopped in transit and refused to move. The engine crankshaft pully also refuses to roll manually.
What can be done to restore?
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