C109E Lincoln Code - Vacuum Sensor Circuit Fault
Quick Answer
The vacuum sensor is used by the Anti-Lock Brake System (ABS) Module to determine if hydraulic pump intervention is necessary due to loss of vacuum in the booster. Common causes include Loose Brake Booster Vacuum Hose, Faulty Brake Booster Vacuum Sensor, Brake Booster Vacuum 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
- C109E Lincoln indicates Vacuum Sensor Circuit Fault.
- Common causes
- Common causes include Loose Brake Booster Vacuum Hose, Faulty Brake Booster Vacuum Sensor, Brake Booster Vacuum 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 C109E Lincoln Description
When the vacuum in the brake booster falls below a predetermined level, the ABS module will command the hydraulic pump motor to activate on the next (and any subsequent) brake pedal application to assist with vehicle braking. The ABS module will continue to use the pump motor for braking assist as long as the low vacuum condition exists.
What are the Possible Causes of the DTC C109E Lincoln?
- Loose Brake Booster Vacuum Hose
- Faulty Brake Booster Vacuum Sensor
- Brake Booster Vacuum Sensor harness is open or shorted
- Brake Booster Vacuum Sensor circuit poor electrical connection
How to Fix the DTC C109E Lincoln?
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 C109E Lincoln 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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Frequently Asked Questions about C109E Lincoln Code
1. What does the OBDII code C109E mean on a Lincoln?
The C109E code indicates a Vacuum Sensor Circuit Fault, meaning the vehicle's vacuum sensor is not functioning correctly or its circuit has an issue.
2. What are the common symptoms of code C109E on a Lincoln?
Symptoms may include the ABS warning light turning on, reduced braking performance, or inconsistent brake pedal feel.
3. What causes the C109E Vacuum Sensor Circuit Fault?
Common causes include a faulty vacuum sensor, damaged wiring or connectors in the sensor circuit, or a problem with the ABS module.
4. Can I drive my Lincoln with the C109E code active?
While the vehicle may still be drivable, it's not recommended as the braking system may not perform optimally, posing a safety risk.
5. How do you diagnose the C109E code on a Lincoln?
Diagnosis typically involves scanning for codes, visually inspecting the vacuum sensor and its wiring, and testing the sensor's functionality with a multimeter.
6. How do I fix the C109E Vacuum Sensor Circuit Fault?
Repairs may involve replacing the vacuum sensor, repairing damaged wiring or connectors, or recalibrating the ABS module if necessary.
7. How much does it cost to repair the C109E code on a Lincoln?
Repair costs vary but typically range from $150 to $400 depending on whether the vacuum sensor or wiring needs replacement.
8. Can a dirty vacuum line cause the C109E code to appear?
Yes, if the vacuum line is clogged or leaking, it can cause the sensor to provide incorrect readings, triggering the code.
9. Does the C109E code affect the ABS system?
Yes, the C109E fault can impact the ABS system's ability to function properly, potentially reducing its effectiveness during hard braking.
10. Can a weak battery cause the C109E code on a Lincoln?
While unlikely, a weak or failing battery could potentially cause electrical issues that might affect the vacuum sensor circuit.
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