WJ pulling 9 O2 sensor codes? - JeepForum.com
 
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post #1 of 3 Old 07-11-2019, 03:22 PM Thread Starter
alex9
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2003 WJ 
 
Join Date: Jul 2019
Posts: 1
Unhappy WJ pulling 9 O2 sensor codes?

Hey everyone! I have a 2003 WJ 4.7L V8 that has recently been getting terrible gas mileage (9mpg) and doesn't have as much power as it used to.

I turned the key 3 times and the codes I'm getting are P0031, P0051, P0132, P0152, P0138, P0158, P0131, P0136, and P1499.

Since all of these popped up at once it makes me think that it's a bigger problem than just the O2 sensors. Has this happened to anyone? I have no idea what the problem could be.

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post #2 of 3 Old 07-11-2019, 05:28 PM
jtec
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2014 JK Wrangler 
 
Join Date: Oct 2017
Posts: 5,870
all likely wiring issues, have you looked at wiring and connectors on the indicated components - Have you driven in water, off road, any recent work ?
I have seen rodents create a mess of wiring, If you can a SCAN may show more codes hopefully help explain.

group the codes

P0031-1/1 O2 SENSOR HEATER CIRCUIT LOW
P0051-2/1 O2 SENSOR HEATER CIRCUIT LOW

P0131-1/1 O2 SENSOR SHORTED TO GROUND
P0136-1/2 O2 SENSOR HEATER CIRCUIT MALFUNCTION


P0132-1/1 O2 SENSOR SHORTED TO VOLTAGE
P0138-1/2 O2 SENSOR SHORTED TO VOLTAGE
P0152-2/1 O2 SENSOR SHORTED TO VOLTAGE
P0158-2/2 O2 SENSOR SHORTED TO VOLTAGE

When I see the price of OEM I think aftermarket.
When I see the quality of aftermarket I think OEM.
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post #3 of 3 Old 07-11-2019, 06:04 PM
RoccoRacer
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2001 WJ 
 
Join Date: Sep 2014
Location: Logan
Posts: 86
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You probably have a short somewhere. Also check your fuse box, location 16 is probably blown.
https://images.app.goo.gl/ACruSFiszKEurKXb9


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2001 Jeep Grand Cherokee Limited, "Chewbacca"
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