P014D OBD Error Code: Problem & Solutions

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Oftentimes, Engine Warning Light turns up almost immediately it senses the OBD code error. This directly impacts the engine performance as it struggles with power and acceleration as well as failed fuel system causing increased consumption of fuel by the engine.

OBD-II Code Decreased engine performance is defined as an O2 Sensor Slow Response - Lean to Rich

Exhaust gases are pushed into the exhaust manifold where they flow over/through the O2 sensor. Exhaust flows through the O2 sensor vent holes and across the sensing element and ambient air is drawn through the wire lead cavities where it gets trapped in a small chamber in the centre of the sensor. The trapped ambient air is heated by the exhaust, forcing the oxygen ions to produce voltage read by the PCM. This allows PCM to take action on the fuel delivery systems as well as the engine performance.

If the O2 sensor fails to cycle as rapidly and/or regularly as expected, over a set period of time and under certain predetermined circumstances, an OBD code P014D error gets stored and a malfunction indicator lamp (MIL) may be illuminated.

What causes the problem of O2 Sensor Slow Response - Lean to Rich (B1 S1)?

• Failure of Heated oxygen sensor bank 1 sensor 1
• Open/short/damaged wiring to ground
• Heated oxygen sensor poor connections
• Error in the Engine Control Unit (ECU)
• Short to ground Heater Control Circuit
• Short to battery voltage in the Heater Control Circuit

1. Powertrain Control Module - P014D error code also relates to problems with the PCM. This can cause wrong reading being stored in the PCM from the sensor. Replace faulty PCM now.
2. Oxygen Sensor Cable - Damaged sensor cable will hamper the functioning of the oxygen sensor, and thus, should be replaced immediately.
3. Exhaust Manifold - Check for leaky and damaged exhaust manifolds that affect the engine power along with affecting other components of the car. Buy new manifolds form us!
4. Ambient Air Temperature Sensor - Affected sensor may cause reduced fuel economy, engine overheating and Check Engine Light illumination. Thus, replace it as soon as it is found to be faulty.
5. Catalytic Converter - Catalytic converters at fault will lead to increased emissions and affected fuel economy. Replace them now!
6. Exhaust System - Always check for faulty mufflers, converters, exhaust pipes, headers, gaskets and other parts related to exhaust system and replace/repair as necessary.
7. Mass Air Flow Sensor - MAF sensor directly affect the intake system, fuel delivery system and the engine performance and should be replaced. If faulty.
8. Throttle Position Sensor - The TPS helps with the fuel management system and can cause performance issues, if faulty. Thus, check for the problem and resolve it immediately.
9. Diagnostic Tools - Use professional scanning and diagnostic tools to detect and correct the OBD code problems. Buy now!

The vehicle's ECU runs checks on sensors multiple times a second. When the ECU finds high voltage in the Bank 1 Sensor 1 (rich condition), it causes a Check Engine Light to illuminate. This results in wrong readings from the heated oxygen sensor. It can also lead to vehicle running poorly and a decrease in fuel efficiency along with frequent stalling and increased emissions.

Common Symptoms

• Decreased fuel economy
• Stalling engine
• Loss of acceleration and power
• Check engine light illumination

• Replace Heated oxygen sensor bank 1 sensor 1
• Repair/replace open and/or shorted wiring
• Repair/replace faulty ECU
• Check for faulty connections
• Replacement of blown fuses

At Parts Avatar Canada, find the best quality replacement and performance parts at the best price in the market to correctly diagnose the OBD Code P014D error.

• Use a professional grade diagnostic scan tool to check for all codes present (must be used to show live sensor data).
• Observe and take note of any freeze frame data that is associated with the code along with the current collected data after the test drive.
• After the confirmation of P014D, clear the code and perform a test drive under the same circumstances shown in the freeze frame data.
• If the P014D code returns, visual inspection is performed to check the integrity of the wiring and sensor.
• Scan with a tool used to monitor live data from Bank 1 Sensor 1 if the previous step is found to be okay.
• If the engine is running efficiently, upstream O2 sensor data should fluctuate regularly between 1-millivolt (.100-volts) and 9-millivolts (.900-olts). If voltage fluctuations are slower than expected, a P014D will be stored.
• Check resistance of the O2 sensor in question, as well as voltage and ground signals. To prevent control module damage, disconnect related controllers prior to testing system circuit resistance with the DVOM.
• Check and test the ECU if the sensor checks out as under the rarest of chances it may be possible that ECU is faulty and needs replacement.

Common Mistakes When Diagnosing OBD Code P014D

Never directly assume the Heated Oxygen Sensor is bad and needs replacement. Follow the diagnostic steps and ensure that the wiring and other components are in good condition. Always seek professional help to get the diagnosis.