C1222 Code - Speed Wheel Mismatch
Quick Answer
The ABS module receives wheel speed readings from each wheel speed sensor and processes this information to determine if an ABS event is necessary. Common causes include Wheels or tires mismatch, Faulty Wheel Speed Sensor, Wheel Speed Sensor harness is open or shorted. 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
- C1222 indicates Speed Wheel Mismatch.
- Common causes
- Common causes include Wheels or tires mismatch, Faulty Wheel Speed Sensor, Wheel Speed Sensor harness is open or shorted.
- 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 C1222 Description
The active wheel speed sensor generates a signal that is sent to the ABS module. The wheel speed sensor circuitry connects to the ABS module through 2 wires and a connector at each wheel speed sensor. When the ignition is turned to the RUN position, the ABS module carries out a self-test by sending a reference voltage to all of the wheel speed sensors through their circuitry to determine if they are functional.
The ABS module continuously monitors and compares the rotational speed of each wheel and when it detects an impending wheel lock, modulates brake pressure to the appropriate brake caliper. This is accomplished by triggering the hydraulic control unit (HCU) to open and close the appropriate solenoid valves. Once the affected wheel returns to normal speed, the ABS module returns the solenoid valves to their normal position and normal (base) braking resumes.
What are the Possible Causes of the DTC C1222?
- Wheels or tires mismatch
- Faulty Wheel Speed Sensor
- Wheel Speed Sensor harness is open or shorted
- Wheel Speed Sensor circuit poor electrical connection
How to Fix the DTC C1222?
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 C1222 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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Information for Specific Makes
- C1222 Buick — Right Front Wheel Speed Sensor Input Signal Is Zero
- C1222 Cadillac — Right Front Wheel Speed Sensor Input Signal Is Zero
- C1222 Chevrolet — Right Front Wheel Speed Sensor Input Signal Is Zero
- C1222 Chrysler — Brake Pedal Travel Sensor/Brake Pressure Sensor Correlation
- C1222 Dodge — Brake Pedal Travel Sensor/Brake Pressure Sensor Correlation
- C1222 Ford — Speed Wheel Mismatch
- C1222 GMC — Right Front Wheel Speed Sensor Input Signal Is Zero
- C1222 Jaguar — Speed Wheel Mismatch
- C1222 Jeep — Brake Pedal Travel Sensor/Brake Pressure Sensor Correlation
- C1222 Lincoln — Speed Wheel Mismatch
- C1222 Mercury — Speed Wheel Mismatch
- C1222 Pontiac — Right Front Wheel Speed Sensor Input Signal Is Zero
Frequently Asked Questions about C1222 Code
1. What are the common symptoms of OBDII code C1222 (Speed Wheel Mismatch)?
The common symptoms of OBDII code C1222 include the ABS warning light illuminating on the dashboard, traction control system malfunctions, and potential issues with the vehicle's stability control.
2. What causes the OBDII code C1222 (Speed Wheel Mismatch) to trigger?
OBDII code C1222 is typically triggered when there is a discrepancy in speed readings between the wheels of the vehicle, often due to a faulty wheel speed sensor or a problem with the ABS system.
3. How can I diagnose the OBDII code C1222 (Speed Wheel Mismatch) at home?
You can diagnose OBDII code C1222 using an OBDII scanner to read the fault codes stored in the vehicle's computer system. Additionally, visually inspecting the wheel speed sensors and their wiring connections can help identify potential issues.
4. What are some repair tips for addressing OBDII code C1222 (Speed Wheel Mismatch)?
Repairing OBDII code C1222 may involve replacing a faulty wheel speed sensor, repairing damaged wiring connections, or addressing issues with the ABS system. It is recommended to follow the manufacturer's repair procedures or seek assistance from a professional mechanic.
5. Can driving with OBDII code C1222 (Speed Wheel Mismatch) cause further damage to the vehicle?
Continuing to drive with OBDII code C1222 present may lead to issues with the vehicle's stability control and traction control systems. It is advisable to address the underlying cause of the code to prevent further damage and ensure safe operation of the vehicle.
6. How much does it typically cost to repair OBDII code C1222 (Speed Wheel Mismatch)?
The cost of repairing OBDII code C1222 can vary depending on the specific cause of the issue, the labor rates of the repair shop, and the cost of any replacement parts needed. It is recommended to obtain quotes from different repair facilities for an accurate estimate.
7. Are there any temporary fixes or workarounds for OBDII code C1222 (Speed Wheel Mismatch)?
There are no recommended temporary fixes for OBDII code C1222, as addressing the root cause of the issue is essential to ensure the proper functioning of the vehicle's safety systems. Ignoring the code may lead to safety risks and further damage.
8. How long does it typically take to repair OBDII code C1222 (Speed Wheel Mismatch)?
The repair time for OBDII code C1222 can vary depending on the complexity of the issue and the availability of parts. Some repairs may be completed within a few hours, while others may require more extensive diagnostics and labor.
9. Can OBDII code C1222 (Speed Wheel Mismatch) be reset without fixing the underlying issue?
Resetting OBDII code C1222 without addressing the underlying issue will only temporarily clear the fault code. The code is likely to reappear once the vehicle's computer system detects the same issue again.
10. Is it safe to drive my vehicle with OBDII code C1222 (Speed Wheel Mismatch) if the symptoms are not severe?
While it may be safe to drive the vehicle short distances with mild symptoms of OBDII code C1222, it is advisable to have the issue diagnosed and repaired as soon as possible to prevent potential safety hazards and further damage to the vehicle.
Discuss the causes and fixes for C1222 OBDII Code
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2001 Mustang Cobra DOHC w/ 67,000 miles. The only lights that flashed on and then off were the "Traction Control", then the "ABS" light.
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The means that one (or more ) of the wheel is turning either slower of faster that the other ones. You could start by checking the tires, make sure all the tires are the same size and are in good condition. If the all the tires are OK, then of the wheel sensors is not reading properly.
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You need an special OBDII scanner that can access the ABS system and read the signal from each sensor. Did you checked the tires condition and pressure?
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I only have a "CarMD" and I don't see any mention of reading ABS; but as far as the tires go, it has excellent tires and I check the tire pressure regularly. But more importantly, my car was built before they (Ford) installed tire pressure monitoring. I did buy an a Ford Rotunda "VCMII" pass-thru; so I could re-program my computer (using the rented software from Ford). Unfortunately, I was not able to down-load that software and my email to Ford have gone unanswered.
Can't I use a "multimeter" to test the ABS at each wheel and at the pump, to locate the problem?
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