AutoCodes – Cadillac – P0221 Cadillac

P0221 Cadillac Code - Throttle Position Sensor 2 Performance

Quick Answer

The Throttle Body Assembly contains a contact-less inductive throttle position sensing element that is managed by a customized integrated circuit. Common causes include Faulty Throttle Body Assembly, Throttle Body Assembly harness is open or shorted, Throttle Body 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
P0221 Cadillac indicates Throttle Position Sensor 2 Performance.
Common causes
Common causes include Faulty Throttle Body Assembly, Throttle Body Assembly harness is open or shorted, Throttle Body 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.
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Code Popularity 287
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Nov 05, 2023
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Code P0221 Cadillac Description

The Throttle Body Assembly contains a contact-less inductive throttle position sensing element that is managed by a customized integrated circuit. The throttle position sensor is mounted within the throttle body assembly and is not serviceable. The Engine Control Module (ECM) supplies the throttle body with a 5 V reference circuit, a low reference circuit. The asynchronous signal means communication is only going from the throttle body to the ECM. The throttle body cannot receive data from the ECM over the signal/serial data circuit. The throttle position sensor provides a signal voltage that changes relative to throttle blade angle. The throttle position sensor information is transmitted between the throttle body and the ECM on the signal/serial data circuit. The ECM decodes the serial data signal and is used as voltages for throttle position sensor 1 and 2. The Diagnostic Trouble Code (DTC) will be set when the ECM detects the throttle position sensor 2 signal voltage is less than 0.25 V for greater than 1 s.
OBDII Code P0221 Cadillac - Throttle Position Sensor 2 Performance - AutoCodes.com
P0221 Cadillac Code - Throttle Position Sensor 2 Performance

What are the Possible Causes of the DTC P0221 Cadillac?

  • Faulty Throttle Body Assembly
  • Throttle Body Assembly harness is open or shorted
  • Throttle Body Assembly circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

How to Fix the DTC P0221 Cadillac?

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 P0221 Cadillac 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.

Need more information about the P0221 Cadillac code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0221 Cadillac Code

What does OBDII code P0221 mean for a Cadillac?

P0221 indicates a problem with Throttle Position Sensor 2, suggesting its performance is outside the expected range.

What are the common symptoms of code P0221 in a Cadillac?

Symptoms include poor acceleration, engine hesitation, reduced fuel efficiency, and possible activation of the Check Engine Light.

What causes the P0221 code in a Cadillac?

Common causes include a faulty throttle position sensor, damaged wiring or connections, or issues with the throttle body.

Can I drive my Cadillac with code P0221?

Driving with this code is not recommended, as it can cause unpredictable throttle behavior and compromise safety.

How can I diagnose code P0221 in a Cadillac?

Use an OBDII scanner to confirm the code, inspect the throttle position sensor and wiring for damage, and check for proper voltage readings.

What repair fixes the P0221 code on a Cadillac?

Repairs may include replacing the throttle position sensor, repairing damaged wiring, or cleaning/replacing the throttle body.

Is the throttle position sensor expensive to replace on a Cadillac?

The cost varies by model but typically ranges from $100 to $300 for parts and labor.

Can a dirty throttle body cause the P0221 code?

Yes, a dirty or malfunctioning throttle body can affect sensor readings and trigger the code.

How do I reset the P0221 code after repairs?

Use an OBDII scanner to clear the code, or disconnect the battery for a few minutes to reset the system.

Should I replace both throttle position sensors if one fails?

It's not always necessary, but replacing both sensors may ensure consistent performance, especially if they are aging.

Discuss the causes and fixes for P0221 Cadillac OBDII Code

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