AutoCodes – Acura – P2252 Acura

P2252 Acura Code - Air/Fuel Ratio Sensor 1 Bank 1 Circuit Low Voltage

Quick Answer

The Air/Fuel ratio (A/F) sensor (sensor 1) is installed in the exhaust system and detects oxygen content in the exhaust gas. Common causes include Faulty Air/Fuel Ratio Sensor 1 Bank 1, Air/Fuel Ratio Sensor 1 Bank 1 harness is open or shorted, Air/Fuel Ratio Sensor 1 Bank 1 electrical circuit poor connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P2252 Acura indicates Air/Fuel Ratio Sensor 1 Bank 1 Circuit Low Voltage.
Common causes: Common causes include Faulty Air/Fuel Ratio Sensor 1 Bank 1, Air/Fuel Ratio Sensor 1 Bank 1 harness is open or shorted, Air/Fuel Ratio Sensor 1 Bank 1 electrical circuit poor connection.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 3,841

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2252 Acura Description

The Air/Fuel ratio (A/F) sensor (sensor 1) is installed in the exhaust system and detects oxygen content in the exhaust gas. The A/F sensor transmits output voltage to the Powertrain Control Module (PCM). A heater for the sensor element is embedded in the A/F sensor (sensor 1). It heats the sensor to stabilize and speed the detection of oxygen content. The increase in current through the heater levels off as the voltage applied to the electrode reaches a certain range because the amount of oxygen that goes through the diffusion layer is limited. The current is proportional to oxygen content in the exhaust gas, so the air/fuel ratio is detected by the measurement of the current. The PCM compares a set target air/fuel ratio with the detected air/fuel ratio and controls the fuel injection duration. If the A/F sensor (sensor 1) voltage is low, the air/fuel ratio is lean, and the PCM uses A/F feedback control to issue a rich command. If the A/F sensor (sensor 1) voltage is high, the air/fuel ratio is rich, and the PCM uses A/F feedback control to issue a lean command. If the element is not activated or the PCM terminal voltage is a set value or less for a set time when power is drawn to the A/F sensor (sensor 1) heater, a malfunction is detected and a DTC is stored.

OBDII Code P2252 Acura - Air/Fuel Ratio Sensor 1 Bank 1 Circuit Low Voltage - AutoCodes.com — P2252 Acura Code - Air/Fuel Ratio Sensor 1 Bank 1 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2252 Acura?

Faulty Air/Fuel Ratio Sensor 1 Bank 1
Air/Fuel Ratio Sensor 1 Bank 1 harness is open or shorted
Air/Fuel Ratio Sensor 1 Bank 1 electrical circuit poor connection
Vacuum leak
Low fuel pressure

How to Fix the DTC P2252 Acura?

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 P2252 Acura 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 P2252 Acura code?

Need more information on how to fix the P2252 Acura code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2252 Acura code diagnosed by a professional: Find a repair shop in your area

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 P2252 Acura Code

1. What are common symptoms of OBDII code P2252 in an Acura related to the Air/Fuel Ratio Sensor 1 Bank 1 Circuit Low Voltage?

- Common symptoms include poor fuel efficiency, rough idling, hesitation or stalling during acceleration, and an illuminated check engine light.

2. What are the potential causes triggering OBDII code P2252 in an Acura?

- The code P2252 indicating Air/Fuel Ratio Sensor 1 Bank 1 Circuit Low Voltage may be caused by a faulty air/fuel ratio sensor, wiring issues, or a malfunctioning engine control module (ECM).

3. How can I diagnose the root cause of OBDII code P2252 in my Acura?

- To diagnose P2252, start by checking the wiring harness and connectors for any signs of damage or corrosion. Next, test the air/fuel ratio sensor itself using a multimeter to ensure it is functioning within specifications.

4. Can I continue driving my Acura with OBDII code P2252 triggered?

- It is not recommended to drive your Acura with the P2252 code active, as it can lead to decreased fuel efficiency and potential engine performance issues. It is best to address the underlying problem promptly.

5. Are there any simple repair tips for fixing OBDII code P2252 in an Acura?

- Some simple repair tips include checking and cleaning the sensor connectors, inspecting and repairing damaged wiring, and ensuring proper sensor installation to address the low voltage issue.

6. How do I reset the check engine light after repairing OBDII code P2252 in my Acura?

- After repairing the issue causing code P2252, you can reset the check engine light using an OBDII scanner or by disconnecting the car battery for a few minutes to clear the ECM's memory.

7. Is it advisable to replace the air/fuel ratio sensor when dealing with OBDII code P2252 in an Acura?

- Yes, if the diagnosis confirms a faulty air/fuel ratio sensor as the cause of P2252, replacing the sensor is advisable to ensure proper engine performance and emission control.

8. Can a DIY enthusiast fix OBDII code P2252 in an Acura, or should I seek professional help?

- While some aspects of diagnosing and repairing P2252 can be done by a DIY enthusiast, complex issues or sensor replacements may require professional help to ensure proper resolution.

9. How much can I expect to spend on repairing OBDII code P2252 in my Acura?

- The cost of repairing P2252 can vary based on the root cause, but expenses may include parts such as a new air/fuel ratio sensor and labor costs if professional assistance is needed.

10. Will fixing OBDII code P2252 improve my Acura's overall performance and fuel efficiency?

- Yes, addressing the low voltage issue related to the air/fuel ratio sensor can lead to improved engine performance, smoother operation, and better fuel efficiency in your Acura.