P1191 Code - Electronic Throttle System Limp Home Valve On
Quick Answer
The P1191 diagnostic trouble code (DTC) indicates that the Electronic Throttle System Limp Home Valve is on. Common causes include Faulty throttle position sensor, Electronic throttle control unit malfunction, Wiring or connection issues. 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
- P1191 indicates Electronic Throttle System Limp Home Valve On.
- Common causes
- Common causes include Faulty throttle position sensor, Electronic throttle control unit malfunction, Wiring or connection issues.
- 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 P1191 Description
The P1191 diagnostic trouble code (DTC) indicates that the Electronic Throttle System Limp Home Valve is on. This code is typically associated with electronic throttle control systems, which manage the throttle opening electronically rather than through a traditional cable system. The limp home valve is a safety feature that allows the vehicle to operate at reduced power in the event of a system failure to prevent a complete shutdown.
Common Causes of P1191
- Faulty throttle position sensor
- Electronic throttle control unit malfunction
- Wiring or connection issues
- Throttle body malfunction
- Electronic control module failure
Symptoms of P1191
- Reduced engine power
- Difficulty accelerating
- Check engine light illuminated
- Rough idling
- Stalling at low speeds
How to Fix P1191
- Begin by using a diagnostic scan tool to retrieve the fault codes and identify the specific issue triggering the P1191 code.
- Inspect the throttle position sensor and wiring for any signs of damage or wear. Replace any faulty components as needed.
- Check the electronic throttle control unit for proper operation and connectivity. Repair or replace any malfunctioning parts.
- Clean the throttle body to ensure smooth operation and proper airflow.
- Clear the fault codes from the vehicle's computer and perform a test drive to verify that the issue has been resolved.
Cost to Fix P1191
The cost of repairing a P1191 code can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. On average, you can expect to pay anywhere from $150 to $500 for parts and labor to address this problem. Keep in mind that rates can fluctuate based on location, vehicle make and model, and the extent of the repairs needed. Be sure to consult with a professional mechanic for an accurate estimate tailored to your specific situation.
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Code P1191 Information for Specific Makes
- P1191 BMW — Pre-Catalyst Fuel Trim System Bank 2
- P1191 Buick — Intake Air Duct Air Leak
- P1191 Cadillac — Intake Air Duct Air Leak
- P1191 Chevrolet — Intake Air Duct Air Leak
- P1191 Dodge — HO2S Insufficient Switching Bank 1 Sensor 1
- P1191 Ford — Key Line Voltage
- P1191 GMC — Intake Air Duct Air Leak
- P1191 Hyundai — Electronic Throttle System Limp Home Valve On
- P1191 KIA — Electronic Throttle System Limp Home Valve On
- P1191 MINI — Pre-Catalyst Fuel Trim System Bank 2
Frequently Asked Questions about P1191 Code
What does the OBDII code P1191 mean?
P1191 indicates an issue with the Electronic Throttle System (ETS), specifically that the Limp Home Valve has been activated, putting the vehicle in a reduced power mode.
What are the common symptoms of code P1191?
Symptoms may include reduced engine power, limited throttle response, the Check Engine Light being illuminated, and difficulty accelerating.
What causes the P1191 code to appear?
Common causes include a malfunctioning throttle body, a faulty throttle position sensor, wiring issues, or a problem with the electronic throttle control module.
Can I drive my car with the P1191 code active?
While it may be possible to drive in limp mode, it's not recommended as the vehicle's performance is limited and further damage can occur if the issue isn't resolved.
How is the P1191 code diagnosed?
A mechanic will use a scan tool to confirm the code, inspect the throttle body and sensors, check for wiring or connection issues, and test the electronic throttle control system.
What repairs can fix the P1191 code?
Repairs may include cleaning or replacing the throttle body, replacing the throttle position sensor, repairing or replacing damaged wiring, or reprogramming the electronic throttle control module.
Can a dirty throttle body cause the P1191 code?
Yes, a dirty or carbon-clogged throttle body can restrict airflow and trigger the P1191 code by causing the limp home valve to activate.
How much does it typically cost to fix the P1191 code?
Repair costs can vary, ranging from $100 for a throttle body cleaning to $500 or more for replacing components like the throttle body or sensors.
Is the P1191 code specific to certain car brands?
The P1191 code is often associated with Hyundai and Kia vehicles, but the issue can occur in other makes that use similar electronic throttle systems.
Can the P1191 code be cleared without repairs?
Clearing the code without addressing the underlying issue may temporarily turn off the Check Engine Light, but the problem will likely return until properly fixed.
Discuss the causes and fixes for P1191 OBDII Code
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