Question about 2001 Jeep Wrangler

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Po135 code on 2001 jeep have replaced up stream frt. sensor

Have 12v at sensor connector with engine running, still get po135 code.

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  • Jeep Expert
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Dit you check the fuse? Jeeps many times ha e problems with Bosch sensors due to the slower heating. Best is to use Denso.

Posted on May 27, 2014

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Check the cylinders Commpression. over 115 psi is good, 120 psi is normal.

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SOURCE: 2001 Jeep Grand Cherokee code P1391

I would check to be sure that the timing chain hasn't jumped at all ..

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On the top of the bellhousing. From the drivers point of view it is in the 11:00 o'clock position. The harness wraps around the back of the bellhousing and plugs in on the passenger side of the block near the oil sending unit.

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SOURCE: 2001 jeep grand chorkee long crank times replaced crank sensor cam sensor and fuel pump cold starts only 4.7 engine

Car not starting or turning over indicates towards multiple possibilities. It can be issue with battery or weak battery. But if battery checks out ok, then it can be starter issue or faulty alternator or problem with low fuel pressure or no spark at spark plugs due to dirty spark plugs or faulty ignition coil or injectors getting cracked or dirty and needs to be cleaned.


To confirm the problem, the basic troubleshooting is required.


Click this link below and follow the troubleshooting:------

http://technoanswers.blogspot.in/2012/02/car-starting-issues.html

---------

This will help.

Thanks.

Posted on Mar 05, 2012

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Pin 30 on 02 sensor relay on 2001 4.0L jeep should it have 12v at all times


great question and great digging , you have bad 02.
im sad because you didnt post the symptoms or evidence.
real said, so i can get on the same page...
so you found out it has a relay... but which one?
the ASRD relay or the down stream relays (I guess at down)


it is a grand cherokee right and has 4l. good.
wow 16 pages on 02 alone, just schematics.
left bank, or right bank, always post sensor code like this
B1S2, B2S1... see? so i dont have to read all 16 pages.
ill take the wild assumption B1S2. the most important one.
the down stream. relay ,is just a reg. common, SPST relay.
30 and 86 are jumped, (connected) and are 12v key one
or the ASRD is malfing (not saying it is bad) or the fuse is blown
you did check all fuses first , right? with any ohm meter !!!
fuse 16 is pin 30
the output of relay is 87
the control line (coil) is 86, the PCM controls this line using
COMPLEX logic.
so bad to CONTEXT
why are you fiddling down stream ?
got P040x errors, got scan errors for CAT is weak?......
these sensors only test the cat for early or late death
why be here, Smog man? context answer this, or were mis directed
by internet bunny's ?????
this is a great post, one of the few that tell what car. what engine in car.very rare here, kudos.
but no context.
DTC'S?
Smog man
car runs bad need help
what?
CEL glows , no scan tool?
what?


Dec 31, 2013 | Jeep Grand Cherokee Cars & Trucks

1 Answer

Code reading po135 2002 jeep


PO135 is oxygen sensor heater failure bank 1 sensor 1, most likely if no wiring damage is seen it is the oxygen sensor itself. (forward most oxygen sensor on #1 cylinder side)

Apr 04, 2013 | Jeep Grand Cherokee Cars & Trucks

1 Answer

Codes po122 po155 po135 po102


code po122 is for your throttle position sensor. po155 is for your down stream o2 senor .po135 is for your bank 1 sensor 1 o2 sensor. po102 is for your maf sensor

Dec 19, 2012 | 2000 Ford Expedition

1 Answer

Jeep Cherokee 96 will idle but as soon as you give it gas it dies. Replaced the fuel pump and the code reader is not displaying any errors.


u need to have a code reader with data stream....hook that up to ur obd connector an goto data stream..... goto TPS there will b a voltage reading when the jeep is running step on the gas an check for a voltage drop..if it drops u r commanding the fuel pump to deliever less fuel when the engine needs more....if u dont have a voltage reading on ur TPS when running replace TPS (throttle position switch). if u dont have a data stream option u will nedd to bring it to a servivce station for this service

Jul 16, 2011 | 1996 Jeep Cherokee

1 Answer

2001 silverado po300 code and po135 code changed 2 o2 sensors still coming up have not changed driver side o2s yet


Well the P0300 code has nothing to do with your O2 sensors just a heads up.

P0300: Random/Multiple Cylinder Misfire Detected

When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crankshaft position (CKP) sensor (POS) signal to vary, Powertrain Control Module (PCM) or Electronic Control Module (ECM) can determine that a misfire is occurring.

Causes:
- Improper spark plug
- Insufficient compression
- Incorrect fuel pressure
- The injector circuit is open or shorted
- Fuel injectors may be faulty
- Intake air leak
- The ignition signal circuit is open or shorted

Solutions:
- Perform Injector Service
- Replace Spark Plugs
- Replace Injectors
- Replace Ignition Coils

P0135: O2 Sensor Heated Circuit Malfunction Bank 1 Sensor 1

The front heated oxygen sensor (or sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the ECM. The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.

Causes:
- Harness or connectors (The sensor circuit is open or shorted)
- Front Heated oxygen sensor (Bank 1) may be faulty

Solutions:
Replacing the O2 Sensor 1 usually takes care of the problem

Jan 27, 2011 | 2001 Chevrolet Silverado 1500

1 Answer

Engine has severe miss @ idle under load. Runs fine when driving. Plug and Plug Wires are Ok. Put on a Scanner and got code Po135.


The DTC (Data Trouble Code) P0135 is for the O2 sensor Heater Circuit Bank 1 Sensor 1. Bank 1 will always be the cylinder bank with the number one cylinder and spark plug, and the number one O2 sensor will be located before the catalytic converter and usually at the rear of the exhaust manifold or just after it. According to the firing order diagram bank one is the cylinder bank that is closest to the fire-wall and there should be an O2 sensor located there around the rear of the exhaust manifold or just after it. If the engine is a 4 cylinder then it will be the O2 sensor before or up-stream of the catalytic converter. Check for any damaged wiring or loose wire connector at the O2 sensor and if they are alright then replace the O2 sensor and then re-set the check engine light. (The auto part store should re-set the check engine light for you if you purchase the O2 sensor from them, and be certain that it is the correct and assembled O2 sensor for your vehicle and not a put together universal O2 sensor)




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Nov 29, 2010 | 1996 Mercury Mystique

1 Answer

What does po135, p1131, and p0305 mean on a ford f250 with a 4.6L 2007


PO135 = Upstream Heated Oxygen Sensor Heater (HTR 11) circuit (Bank #1)

P1131 = Lack of upstream Heated Oxygen Sensor (HO2S 11) switch, sensor indicates lean (Bank #1)

P0305 = Cylinder #5 Misfire detected

It looks like you have two separate issues happening. Bank 1 would be the left side of the engine if you were standing in front of the truck looking at the engine. The "upstream" oxygen sensor will be on the exhaust pipe coming from the bank one side of the truck IN FRONT of the catalytic converter. From the codes, it appears that the upstream sensor has gone bad, but the oxygen sensor behind the catalytic converter, or "down stream" is fine.

The misfire on cylinder 5 on the right side of the engine, 2nd one from the front, could be something as simple as a fouled spark plug or a coil malfunction.

To identify if it is a bad coil, swap the #5 cylinder coil with another coil, and see if the misfire follows the relocated coil.

Dec 22, 2009 | 2007 Ford F-250 Super Duty Lariat

2 Answers

Check engine light on my 2003 sienna, DTC was



Oxygen Sensor Connector locations

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  1. Disconnect the oxygen sensor connector.
  2. Using an ohmmeter, measure the resistance between the terminals +B and HT. Resistance specification: 11 - 16 ohms at 20°C (68°F).
  3. If the resistance is not as specified, replace the sensor.
  4. Reconnect the oxygen sensor connector.

Oxygen Sensor testing

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I really hope helped with this. Remember rated this help, good luck.

Nov 30, 2009 | 2003 Toyota Sienna

2 Answers

Check engine light is on


P0135 02 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P0136 02 Sensor Circuit Malfunction (Bank I Sensor 2)
check for a blown fuse, if it is blown replace it, if it blows again after engine is started you have either a shorted O2 sensor or the wiring leading to the up stream or down stream sensors.

Apr 22, 2009 | 2001 Chevrolet Metro

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