AutoCodes – Cadillac – P205B Cadillac

P205B Cadillac Code - Reductant Tank Temperature Sensor Circuit Range/Performance

Quick Answer

The Reductant Tank Temperature Sensor is a variable resistor used to measure the temperature inside the reductant tank. Common causes include Faulty Reductant Pump and Sensor Assembly, Reductant Pump and Sensor Assembly harness is open or shorted, Reductant Pump and Sensor 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
P205B Cadillac indicates Reductant Tank Temperature Sensor Circuit Range/Performance.
Common causes
Common causes include Faulty Reductant Pump and Sensor Assembly, Reductant Pump and Sensor Assembly harness is open or shorted, Reductant Pump and Sensor 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 563
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 21, 2022
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Code P205B Cadillac Description

The Reductant Tank Temperature Sensor is a variable resistor used to measure the temperature inside the reductant tank. The sensor is wired to the Reductant Control Module, which acquires the sensor signal and sends it to the Engine Control Module (ECM) via serial data. The Reductant Control Module supplies 5 V to the reductant temperature sensor signal circuit and a ground for the low reference circuit. The Diagnostic Trouble Code (DTC) will be set when the difference between reductant temperature sensor signal and exhaust gas temperature sensor signals is outside a calibrated range.
OBDII Code P205B Cadillac - Reductant Tank Temperature Sensor Circuit Range/Performance - AutoCodes.com
P205B Cadillac Code - Reductant Tank Temperature Sensor Circuit Range/Performance

What are the Possible Causes of the DTC P205B Cadillac?

  • Faulty Reductant Pump and Sensor Assembly
  • Reductant Pump and Sensor Assembly harness is open or shorted
  • Reductant Pump and Sensor Assembly circuit poor electrical connection
  • Faulty Reductant Control Module

How to Fix the DTC P205B 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 P205B 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 P205B Cadillac code?

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Need Help with the 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 P205B Cadillac Code

1. What are common symptoms of the P205B OBDII code on a Cadillac related to the Reductant Tank Temperature Sensor Circuit?

- Common symptoms include poor engine performance, reduced fuel efficiency, and the illumination of the Check Engine light.

2. What causes the P205B OBDII code to appear on a Cadillac?

- The P205B code is typically triggered by a malfunction in the Reductant Tank Temperature Sensor Circuit, which may be caused by sensor failure, wiring issues, or a faulty control module.

3. How can I diagnose the P205B code on my Cadillac?

- Diagnosing the P205B code involves using an OBDII scanner to retrieve the specific fault code, inspecting the wiring and connections related to the Reductant Tank Temperature Sensor, and testing the sensor itself for proper operation.

4. What are some repair tips for addressing the P205B code on a Cadillac?

- Repair tips include checking and repairing any damaged wiring, replacing the Reductant Tank Temperature Sensor if faulty, resetting the fault code with a scanner, and ensuring proper reinstallation of components.

5. Can driving with the P205B OBDII code on a Cadillac cause further damage?

- Continuing to drive with the P205B code may lead to decreased fuel efficiency, potential damage to the catalytic converter, and ultimately, engine performance issues if left unresolved.

6. How much does it typically cost to repair the P205B code on a Cadillac?

- The cost of repairing the P205B code can vary depending on the exact cause of the issue, but it may range from $200 to $500 for parts and labor at a repair shop.

7. Is it safe to clear the P205B code on a Cadillac with an OBDII scanner without making repairs?

- Clearing the fault code without addressing the underlying issue may temporarily turn off the Check Engine light, but the problem will likely resurface, leading to potential long-term consequences for your vehicle's performance and emissions.

8. Can I drive my Cadillac with the P205B code if the Check Engine light is not flashing?

- While driving with a non-flashing Check Engine light may be possible, it is recommended to address the underlying issue causing the P205B code as soon as possible to prevent further complications.

9. Will the P205B OBDII code on a Cadillac affect the vehicle's emissions and environmental impact?

- Yes, the P205B code indicates a problem with the Reductant Tank Temperature Sensor Circuit, which can impact the vehicle's emissions control system and environmental compliance.

10. How long does it typically take to repair the P205B code on a Cadillac?

- The repair time for the P205B code can vary depending on the exact cause of the issue and the complexity of the repair, but it may take anywhere from a few hours to a full day at a repair shop.

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