Exception in rendering!

Message: window is not defined

ReferenceError: window is not defined
    at new c (/tmp/execjs20161208-80463-138hhtzjs:136:3912)
    at m.mountComponent (/tmp/execjs20161208-80463-138hhtzjs:47:15602)
    at /tmp/execjs20161208-80463-138hhtzjs:49:31860
    at a.r.perform (/tmp/execjs20161208-80463-138hhtzjs:47:12503)
    at Object.a [as renderToString] (/tmp/execjs20161208-80463-138hhtzjs:49:31821)
    at r (/tmp/execjs20161208-80463-138hhtzjs:50:21164)
    at Object.S.ReactOnRails.serverRenderReactComponent (/tmp/execjs20161208-80463-138hhtzjs:32:6073)
    at eval (eval at <anonymous> (/tmp/execjs20161208-80463-138hhtzjs:173:8), <anonymous>:10:23)
    at eval (eval at <anonymous> (/tmp/execjs20161208-80463-138hhtzjs:173:8), <anonymous>:17:3)
    at /tmp/execjs20161208-80463-138hhtzjs:173:8

P0136 OBD-II Trouble Code: O2 Sensor Circuit Malfunction (Bank 1, Sensor 2)

Check Engine Light

P0136 code definition

O2 Sensor Circuit Malfunction (Bank 1, Sensor 2)

What the P0136 code means

P0136 is the OBD-II generic code indicating the downstream O2 sensor for bank 1 fails to meet the minimum and maximum voltage limits calibrated for the ECM to see.

What causes the P0136 code?

  • The ECM monitors the O2 sensor’s highest and lowest voltages. This code occurs when the voltage limits are not within specifications programmed into the ECM.

  • The ECM detects a voltage problem and turns on the Check Engine Light.

  • The ECM uses other O2 sensors to try and control the fuel injection with known values.

  • There is an exhaust leak or catalyst failure in front of the sensor.

What are the symptoms of the P0136 code?

  • The engine may run excessively rich if the engine goes into open loop.

  • The engine may start to misfire if the spark plugs get fouled out over time.

  • The Check Engine Light will be illuminated.

  • You may have exhaust leaks or loss of power from a clogged or bad catalyst.

How does a mechanic diagnose the P0136 code?

  • Scans codes and documents freeze frame data then clear codes to verify failure

  • Monitors O2 sensor data to see if the voltage is switching back and forth between low and high at a fast rate compared to other sensors

  • Checks the O2 sensor wiring and the harness connections for any corrosion

  • Checks the O2 sensor heater circuit for the proper resistance to specifications

  • Checks for exhaust leaks before the sensor

  • Follow the manufacturer's specific pinpoint tests for further diagnosis.

Common mistakes when diagnosing the P0136 code

Follow these simple guidelines to prevent misdiagnosis:

  • Repair any exhaust leaks before the sensor to prevent incorrect readings.

  • Check the O2 sensor for oil or coolant contaminants from engine leaks.

  • Repair any harness that is damaged properly without taking shortcuts to prevent repeat failures.

  • Check the removed O2 sensor for damage from a defective catalyst and replace the catalyst if it is faulty.

How serious is the P0136 code?

  • The voltage output from the O2 sensor may point to engine and exhaust problems causing the O2 sensors to give erratic output voltages.

  • The O2 sensor may not read correct if the catalyst is damaged in front of the sensor.

  • The ECM may stay in open loop until the O2 system is repaired or the O2 sensor starts working again causing extended rich conditions that could possibly damage other engine components.

What repairs can fix the P0136 code?

Additional comments for consideration regarding the P0136 code

The O2 sensor circuit for bank 1 sensor 2 is used to give a voltage feedback to the ECM to control the fuel and provide information about catalyst operation.

Need help with a P0136 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

Post a question and get free advice from our certified mechanics.

ASK A QUESTION

More related articles

P0121 OBD-II Trouble Code: TPS "A" Circuit Range Performance Problem
P0121 code definition Throttle Pedal Position Sensor/Switch (TPS) A Circuit Range Performance Problem What the P0121 code means P0121 is a generic OBD-II code which indicates that the Engine Control...
P0222 OBD-II Trouble Code: Throttle/Pedal Position Switch/Sensor B Circuit Low Input
P0222 code definition Throttle/Pedal Position Switch/Sensor B Circuit Low Input What the P0222 code means The manufacturer specifies a range of acceptable voltage to be produced from the throttle position...
Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...


Related questions

Q: When engine is cold it studders and misses but when warm it runs juss fine no codes and engine light isnt on why is this happening

When an engine is cold it will need more fuel to run correctly. I would recommend having the fuel injection system cleaned to see if it helps to run better. If the flush does not work then a scan will...

Q: intake control solenoid voltage

If the issue persists then it may be possible that the issue is with wiring or computer. Damaged wiring or a faulty computer may compromise power to the solenoid and affect its performance. Many automotive electronic circuits use 12 volts...

Q: Codes p0136, P0141

Although these codes are both for the downstream O2 sensor, they are completely different. The first code, P0136, has to do with actual sensor performance. The second code, P0141, has to do with the sensor heater circuit performance. The...