AutoCodes – Honda – P1168 1999 Honda Civic

P1168 1999 Honda Civic Code - Air/Fuel Ratio Sensor Label Low Voltage

Quick Answer

The Air/Fuel Ratio (A/F) sensor 1 is installed in the exhaust system and detects oxygen content in the exhaust gas. Common causes include Faulty Air Fuel Ratio Sensor, Air Fuel Ratio Sensor harness is open or shorted, Air Fuel Ratio Sensor 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: P1168 1999 Honda Civic indicates Air/Fuel Ratio Sensor Label Low Voltage.
Common causes: Common causes include Faulty Air Fuel Ratio Sensor, Air Fuel Ratio Sensor harness is open or shorted, Air Fuel Ratio Sensor 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 2,689

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 06, 2019

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1168 1999 Honda Civic Description

The Air/Fuel Ratio (A/F) 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 Engine Control Module (ECM). A heater for the sensor element is embedded in the A/F sensor (sensor 1). It is activated and heats the sensor to stabilize and speed the detection of oxygen content by controlling current flowing through the heater. An increase in the current levels off as the applied voltage to the element electrode reaches a certain range because the amount of oxygen which is led through the diffusion layer is limited. The current amperage is proportional to oxygen content in the exhaust gas, so the air/fuel ratio is detected by the measurement of the current amperage. The ECM compares a set target air/fuel ratio with the detected air/fuel ratio and controls the fuel injection timing.
If the A/F sensor (sensor 1) voltage is low, the air/fuel ratio is lean, and the ECM 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 ECM uses A/F feedback control to issue a Lean command.

OBDII Code P1168 1999 Honda Civic - Air/Fuel Ratio Sensor Label Low Voltage - AutoCodes.com — P1168 1999 Honda Civic Code - Air/Fuel Ratio Sensor Label Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1168 1999 Honda Civic?

Faulty Air Fuel Ratio Sensor
Air Fuel Ratio Sensor harness is open or shorted
Air Fuel Ratio Sensor circuit poor electrical connection

How to Fix the DTC P1168 1999 Honda Civic?

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 P1168 1999 Honda Civic 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 P1168 1999 Honda Civic code?

Need more information on how to fix the P1168 1999 Honda Civic code? Get Access to Factory Service Manuals

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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 P1168 1999 Honda Civic Code

1. What are the common symptoms of OBDII code P1168 in a 1999 Honda Civic?

The common symptoms of code P1168 may include poor fuel economy, rough idling, hesitation or jerking during acceleration, and the illumination of the Check Engine Light.

2. What does the OBDII code P1168 in a 1999 Honda Civic indicate?

Code P1168 indicates that the Air/Fuel Ratio Sensor Label has detected low voltage, which can affect the engine's efficiency and emissions control.

3. What are the possible causes of OBDII code P1168 in a 1999 Honda Civic?

Possible causes of code P1168 include a faulty air/fuel ratio sensor, wiring issues, a malfunctioning engine control module (ECM), or a vacuum leak in the intake system.

4. How can I diagnose the OBDII code P1168 in my 1999 Honda Civic?

Diagnosing code P1168 typically involves using an OBDII scanner to retrieve the code, checking the sensor's voltage readings, inspecting the sensor and wiring for damage, and verifying proper sensor operation.

5. Can I drive my 1999 Honda Civic with OBDII code P1168?

It is generally not recommended to drive your vehicle with an active P1168 code, as it can lead to decreased fuel efficiency and potentially cause further damage to the engine over time.

6. How can I repair OBDII code P1168 in my 1999 Honda Civic?

Repairing code P1168 may involve replacing the air/fuel ratio sensor, repairing or replacing damaged wiring, resetting the ECM, and ensuring there are no vacuum leaks in the intake system.

7. Will resetting the Check Engine Light resolve OBDII code P1168 in my 1999 Honda Civic?

Simply resetting the Check Engine Light may temporarily turn it off, but it will not fix the underlying issue causing code P1168. It is important to diagnose and repair the root cause of the problem.

8. How much does it cost to fix OBDII code P1168 in a 1999 Honda Civic?

The cost of fixing code P1168 can vary depending on the cause of the issue, the labor rates of the repair shop, and the cost of any replacement parts needed. It is recommended to get a diagnosis and repair estimate from a trusted mechanic.

9. Can a DIY enthusiast repair OBDII code P1168 in a 1999 Honda Civic?

Depending on your skill level and access to tools, a DIY enthusiast may be able to repair code P1168 by replacing the air/fuel ratio sensor and checking for wiring issues. However, if you are unsure, it is best to consult a professional mechanic.

10. How often does OBDII code P1168 occur in a 1999 Honda Civic?

Code P1168 is not a common OBDII code in a 1999 Honda Civic, but it can still occur due to sensor or wiring issues. Proper maintenance and timely repairs can help prevent the occurrence of this code.