P0136 I was just driving today...maybe about 20mins and my engine light came on. The code read P0136. I don't know what's wrong.

I would replace the engine thermostat and clear the codes and drive it for a few days. P0136 is engine does not reach operating temperature

The check engine light will stay on until you reset it with a code reader . Do that and see if any other codes come up.

Hello I need help. I need to know because my check engine light on and its stated 2 code P0136 and P304. just wondering I have a 1999 grand marquis GS and needing to help me find the location and the code are P0136 bank 1 sensor 2 need location for this? and P0304 what is this one also. please email me ASAP I really appreciate it . thanks.

It sounds like you have a plugged CAT, The Sulpher smell

P0136 is an oxygen sensor check code for sensor 2 in bank 1. This can indicate a faulty sensor, but more commonly it indicates an issue with the exhaust. There may be a leak somewhere near the sensor causing an erroneous report to the engine computer for fuel to air ratio in the exhaust. This can be difficult to detect. At a garage, they will probably use a smoke machine to detect airflow around exhaust gaskets to spot a leak, barring that, they will replace the sensor. If the light still comes on after confirmation there are no leaks and the sensor has been replaced, it would indicate a problem in the wiring on the line between the sensor and the engine computer.

Further reading about the code can be found here:
http://www.obd-codes.com/p0136

P0442 FORD - Evaporative Emission System Leak Detected Small Leak

Possible causes- Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- EVAP canister or fuel tank leaks
- EVAP system hose leaking
- Fuel tank leaking
P0136 - O2 Sensor Circuit Malfunction Bank 1 Sensor 2
Possible causes- Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Faulty Rear Heated Oxygen Sensor Bank 1
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks

P0141 FORD - O2 Heater Circuit Bank 1 Sensor 2

Possible causes- Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit fuse
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit open shorted to ground
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit poor electrical connection
- Faulty Engine Control Module (ECM)

Hi there:
Both generic codes refer at Oxygen Sensors, an HO2S that responds too slowly is most likely defective. In order to solve it just replace the HO2S; check there description and diagnosis:
- DTC P0136 - O2 Sensor Circuit Malfunction (Bank 1 Sensor 2)
- DTC P0153 - O2 Sensor Circuit Malfunction (Bank 1 Sensor 2)

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.


Thank you for using FixYa, have a nice day.

Hello!
The codes stand for the second lambda sensor and the secondary air injection solenoide. Check if you have 12V supply voltage at the lambda sensor.If you have it then probably the sensor is damaged, if you don't you have to check the fuses and wires.

P0136?

Yes this can be caused by the gas cap lack or week rubber.

Rate this and replace the gas cap.

P0136 = O2 Sensor Circuit Malfunction (Bank 1, Sensor 2)

Which would be the oxygen sensor after the converter.