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Hi, I have a 96 Jeep Cherokee with straight 6 cyclinder engine.The check engine lights on and Itook get to be put on a machine and the codes readed P0132,P0135,P0300,P0301,and P0420. Could you tell me

I need to know what each code is>

Posted by Jacqueline Harrell on

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fordexpert

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  • Cars & Trucks Master
  • 5,692 Answers

P132+ an O2 sensor reading is high bank1,sensor1, p135=O2 Heater circuit is bad, bank1,sensor1.

P300= Random misfires, p301 misfire cylinder1.p302 misfire cylinder2

p420 Bank1 Catalytic converter efficiency failing

What this means is that the Bank1 O2 sensor is either bad or the wiring to it is defective. Check for heat burnthrough on wires. The misfires started randomly and now pinpoint to cylinders 1 and 2.

The Catalytic converter failing because the misfires are clogging it. This can self correct once the cylinders stop misfiring.

Which messed up first is where you start solving this. Replace the O2 sensor, it is fouled out on Bank1. The heater circuit(p135) just makes it work faster and has little effect once you are underway. But high resistence in the O2(p132) means it is coated and ineffective.

There is a problem with firing #1 and #2 sparkplug. Probably the cause for the Catalytic converter plugging. A cracked coil, plug wires, sparkplugs are some causes as well as dirty fuel injectors on those 2 cylinders.

It is a cause and effect situation where 1 part fails and damages another. You need to fix the source of the problem or you will repeat th damage.

Posted on Oct 01, 2012

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5 Related Answers

Scorpedo

Jamie Heppner

  • 111 Answers

SOURCE: 2000 Lexus RX300 6cyl 3L VVT-i "Engine Codes"!

The first and last code are your start and stop so you can ignore them the P1130 and P1150 are your two front oxygen sensors( pre cats ) bank one and two. Depending on your millage it sounds like it is time for a little maintence. Normally they should be changed at or around 60,000 kms

Posted on Dec 12, 2008

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Sam Shamblin

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SOURCE: 98 mercury villager OBD I code P0135

This code refers to the front oxygen sensor on Bank 1. The heated circuit in the oxygen sensor decreases time needed to enter closed loop. As the O2 heater reaches operating temperature, the oxygen sensor responds by switching according to oxygen content of the exhaust surrounding it. The ECM tracks how long it takes for the oxygen sensor to begin switching. It the ECM determines (based on coolant temp) that too much time elapsed before the oxygen sensor began operating properly, it will set P0135.
Repair short or open or high resistance in wiring harness or harness connectors.
Since you have already changed out your O2 sensor (as long as you used to OEM replacement and not the "Universal" replacement) you should not have to replace it again. You might check your thermostat to part of the time it takes for the O2 sensor to start switching being based on coolant temp, if your thermostat is not operating properly, it could cause the coolant temp to take longer than what is considered by the ECM to be normal.

Posted on Feb 22, 2009

Anonymous

  • 29 Answers

SOURCE: 2001 Jeep Cherokee with 6 cylinder engine -- PO306 code cylinder

Plug, plug wire, plugged or open fuel injector. are the most likely.

Posted on Sep 28, 2009

TdiPWR

  • 194 Answers

SOURCE: CODES P0134 AND P0135 ON 96 JETTA

P0134- O2 sensor Circ, bank 1, Sensor 1 no activity detected

P0135- O2 sensor heater circ, bank 1 sensor 1 malfunction

Posted on Dec 20, 2009

GetMeOttaHere

  • 2926 Answers

SOURCE: 2004 jeep grand cherokee overland

P0301 is #1 cylinder misfire detected and is most likely related to a worn spark plug that is need of replacement. All plugs should be replaced if replacing one. Not sure how many miles you have on this vehicle, or if plugs were ever installed, but this is the basic step to take in diagnosis.

Posted on Jun 02, 2010

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I have a 96 jeep grand cherokee with a 4.0 It runs fine but then dies at random and wont start again until it sits for a while. Like i say it dies totally at random. Im thinking a sensor, anyone have


First I suggest scanned the fault codes stored there; turn the ignition key (without start engine) "on/off on/off on" and read odometer codes Pxxxx. Note this codes and send us for other details.

Keep in touch.

Dec 06, 2012 | 1996 Jeep Grand Cherokee

1 Answer

Where are the O2 sensors on a 96 Grand Cherokee with a straight 6?


If you do not know where O2 Sensors are ,I suggest
you let a repair shop test the ones you have,before you
throw parts at it.

No OBD Codes tell you to replace anything

Look on the exhaust pipe before or in the converter
inlet, for the upstream sensor & in the converter
outlet, for the down stream or monitor sensor

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That's not a question

You have a check light on- got to
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If you do all your own work,
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No fire to coil from coil on 96 model Jeep Grand Cherokee.


You need to put the harmonic balance for the 96 jeep on this motor,then put the crankshaft sensor on for the 96 jeep on the vehicle,this should fix you up.The crankshaft sensor and the harmonic balance have to go together.If I can be further help,let me know.>>[email protected]

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your timings off, if its a straight six the distributor is on the left side of your engine, if its a v 6 i think its on the intake manifold
but your definitly out of time!

Jun 24, 2009 | 1996 Jeep Grand Cherokee

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