Error Code P014A: What It Means & What To Do?

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The most common symptom of any OBD code is the illumination of the Check Engine Light. If you notice a lack in the engine performance and reduced fuel efficiency along with lean engine, this might be an indication of faulty oxygen sensor and intake system, thus indicating OBD code P014A error.

 

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

When an OBD-II equipped vehicle has a stored P014A code, it means that the powertrain control module (PCM) has detected a delayed response time from the downstream (or post catalytic converter) oxygen (O2) sensor or circuit for engine bank two. Bank 2 specifies the bank of the engine which does not contain the #1 cylinder.

 

When more oxygen is present in the exhaust (lean condition), the voltage signal from the O2 sensor is low and is higher when less oxygen is present in the exhaust (rich condition). This data is used by the PCM primarily to calculate fuel delivery and ignition timing strategy but also to monitor catalytic converter efficiency.

 

What causes the problem of O2 Sensor Delayed Response – Rich to Lean (B2 S2)?

 

• Defective/damaged O2 sensor
• Burnt, broken, or disconnected wiring and/or connectors related to the sensor and circuit
• Defective/faulty catalytic converter
• Engine exhaust leakages

1. Powertrain Control Module - PCM can store and flash wrong OBD error if it is itself faulty. Replace the faulty PCM components immediately.
2. Oxygen Sensor Cable - Always check for faulty sensor cables and replace them immediately, if faulty or damaged. Buy new sensor cable from us now!
3. Exhaust Manifold - Check for leaky and damaged exhaust manifolds that may cause back pressure imbalance and also affect the engine power along with affecting other components of the car. Thus replace/repair them now!
4. Ambient Air Temperature Sensor - Faulty sensor may cause reduced fuel economy, engine overheating and Check Engine Light illumination. Thus, replace it now!
5. Catalytic Converter - Catalytic converters at fault will lead to increased emissions. Thus, replace faulty parts now!
6. Exhaust System - Check for faulty mufflers, converters, exhaust pipes, headers, gaskets and other parts related to exhaust system that might be causing the OBD code P014A to flash and replace/repair as necessary.
7. Mass Air Flow Sensor - Wrong information sent by the MAF sensor will affect the engine performance adversely. Thus, it is advisable to replace them in time.
8. Throttle Position Sensor - The TPS helps with the fuel management system of the vehicle and if faulty can lead to lowered engine power, rough idles and stalling. Thus, check for the problem and resolve it immediately.
9. Diagnostic Tools - Use professional level tools to detect and correct the OBD code problems. Buy now!

Symptoms for OBD Code P014A error may include the following:

 

Common Symptoms

 

• Reduced fuel efficiency
• Deficient engine performance
• Engine stalling and not starting
• Black smoke from tailpipe
• Rough engine idles
• Service engine soon lamp illumination

• Oxygen Sensor Replacement
• Catalytic Converter Replacement
• MAF Sensor Replacement
• Exhaust Manifold Replacement
• PCM/ECM Replacement 

It is important to check all the components and repair/replace them, if necessary. You can find catalytic converters, temperature sensors, exhaust manifolds, battery connectors, MAF sensors, fuel pumps and parts and a lot more to solve any car part requirement. Buy now!

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• Use a scan tool and put it in vehicle's OBD-II port to confirm presence of P014A error code.
• Data is freeze framed and vehicle speed, operating temperature, engine speed, and operating time is checked for when the code was detected.
• A road test is performed with a scan tool installed in the OBD-II port to confirm an issue is present.
• Visually inspect the wiring on both oxygen sensors for damaged/broken wiring, swapped connectors, or wiring shorted to ground or power.
• Use a multimeter to check that no wiring the distorted or short.
• Low grade replacement catalytic converters are susceptible to repeated failure and should be avoided and replaced with a quality one.
• Search technical service bulletins (TSB) in your vehicle information source. If you find one that matches the symptoms and code/s presented by the vehicle in question, it will very likely aid you in your diagnosis. TSB listings are compiled from thousands of successful repairs.
• 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 P014A will be stored.
• Check for the car’s ECU (Engine Control Unit) and replace if needed.

 

Common mistakes when diagnosing the P014A code

 

Check of faulty wiring and connectors first. Avoid jumping straight to ECU for problems and it will give faulty test results. Follow the step by step diagnosis process at all times keeping in mind the specific make and model.

 

• Replacing Oxygen Sensor without checking problems with other components
• Replacing PCM directly
• Not checking for faulty/damaged wirings and connectors related to circuit and sensors