P1121 Cadillac Code - Throttle Position Sensor Circuit Intermittent High Voltage
Quick Answer
The P1121 Cadillac diagnostic trouble code (DTC) indicates that there is an intermittent high voltage condition in the throttle position sensor (TPS) circuit. Common causes include Faulty throttle position sensor, Loose or corroded electrical connections in the TPS circuit, Wiring harness 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
- P1121 Cadillac indicates Throttle Position Sensor Circuit Intermittent High Voltage.
- Common causes
- Common causes include Faulty throttle position sensor, Loose or corroded electrical connections in the TPS circuit, Wiring harness 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P1121 Cadillac Description
The P1121 Cadillac diagnostic trouble code (DTC) indicates that there is an intermittent high voltage condition in the throttle position sensor (TPS) circuit. The TPS is a crucial component of the engine management system, as it monitors the position of the throttle valve and sends this information to the engine control module (ECM). The ECM uses this data to determine the appropriate fuel delivery and ignition timing for optimal engine performance.
Common Causes of P1121 Cadillac
- Faulty throttle position sensor
- Loose or corroded electrical connections in the TPS circuit
- Wiring harness issues
- ECM malfunction
- Environmental factors such as moisture or debris affecting the TPS
Symptoms of P1121 Cadillac
- Rough idling
- Stalling
- Hesitation or surging during acceleration
- Poor fuel efficiency
- Lack of power
How to Fix P1121 Cadillac
- Begin by conducting a thorough inspection of the TPS and its wiring harness to check for any visible damage or corrosion.
- Test the TPS using a multimeter to verify its functionality and voltage readings.
- If the TPS is faulty, replace it with a new one following manufacturer guidelines.
- Ensure all electrical connections are secure and free of corrosion.
- Clear the DTC using a scan tool and perform a test drive to confirm that the issue has been resolved.
Cost to Fix P1121 Cadillac
The typical repair costs for addressing a P1121 Cadillac code can range from $150 to $300, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. It's advisable to check local rates for a more accurate estimate.
When is the Code Detected?
Need more information about the P1121 Cadillac code?
Need more information on how to fix the P1121 Cadillac code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1121 Cadillac code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1121 Cadillac Code
No Frequently Asked Questions about P1121 Cadillac Code found.
Discuss the causes and fixes for P1121 Cadillac OBDII Code
Code P1121 Cadillac comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.