P1166 1999 Honda Civic Code - Air/Fuel Ratio Sensor 1 Heater Circuit Malfunction
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 1, Air/Fuel Ratio Sensor 1 harness is open or shorted, Air/Fuel Ratio Sensor 1 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
- P1166 1999 Honda Civic indicates Air/Fuel Ratio Sensor 1 Heater Circuit Malfunction.
- Common causes
- Common causes include Faulty Air/Fuel Ratio Sensor 1, Air/Fuel Ratio Sensor 1 harness is open or shorted, Air/Fuel Ratio Sensor 1 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.
Code P1166 1999 Honda Civic Description
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.
What are the Possible Causes of the DTC P1166 1999 Honda Civic?
- Faulty Air/Fuel Ratio Sensor 1
- Air/Fuel Ratio Sensor 1 harness is open or shorted
- Air/Fuel Ratio Sensor 1 circuit poor electrical connection
How to Fix the DTC P1166 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 P1166 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 P1166 1999 Honda Civic code?
Need more information on how to fix the P1166 1999 Honda Civic code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1166 1999 Honda Civic code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1166 1999 Honda Civic Code
1. What does OBDII code P1166 on a 1999 Honda Civic mean?
- The code P1166 indicates a malfunction in the Air/Fuel Ratio Sensor 1 Heater Circuit.
2. What are the common symptoms of a P1166 OBDII code in a 1999 Honda Civic?
- Common symptoms include poor fuel economy, rough idling, hesitation during acceleration, and possible stalling.
3. What are the possible causes of a P1166 code on a 1999 Honda Civic?
- The main causes can be a faulty air/fuel ratio sensor, damaged wiring or connectors in the sensor circuit, or a blown fuse related to the sensor heater.
4. How can I diagnose a P1166 code on my 1999 Honda Civic?
- A thorough inspection of the air/fuel ratio sensor, heater circuit, wiring, and related components using a multimeter and diagnostic scan tool is recommended.
5. Can I still drive my 1999 Honda Civic with a P1166 OBDII code?
- It is not recommended to drive extensively with a P1166 code, as it can lead to poor engine performance and potential damage over time.
6. How do I repair a P1166 code on my 1999 Honda Civic?
- Repair may involve replacing the air/fuel ratio sensor, repairing damaged wiring or connectors, or checking and replacing any blown fuses in the sensor circuit.
7. Can I reset a P1166 OBDII code on my 1999 Honda Civic without fixing the underlying issue?
- While you can clear the code with a scan tool, it is essential to address the root cause to prevent the issue from recurring.
8. Is it safe to continue driving if the P1166 code goes away on its own?
- If the code disappears on its own, it may indicate an intermittent issue. However, it is still advisable to have the system checked to prevent potential problems.
9. How much does it typically cost to repair a P1166 code on a 1999 Honda Civic?
- The cost can vary depending on the specific cause and repair needed, but it may range from $100 to $400, including parts and labor.
10. Can a DIY enthusiast fix a P1166 OBDII code on a 1999 Honda Civic?
- With the right tools, knowledge, and experience, a DIY enthusiast can potentially address the P1166 code by replacing the sensor or checking and repairing the circuit.
Discuss the causes and fixes for P1166 1999 Honda Civic OBDII Code
-
estoy escaniando un toyota 97 camry y no me da codigos porque sera
que no me da codigos
-
Tiene la luz del motor encendida, pero no tiene codigos? inspeccione todos los fusibles para comensar.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
