1996 Dodge Ram Dies while running, has ck. Engine codes

Tiny
PUDDLES1976
  • MEMBER
  • 1996 DODGE RAM
Engine Performance problem
1996 Dodge Ram 6 cyl Two Wheel Drive Automatic 150k miles

This has 2 codes showing on my scanner. 1st is an excessive current reading on the #1 O2 sensor and 2nd is displayed as $D1 Manufacturer specific code. The truck knocks slightly at idle when warm and dies while being driven. I suspect the O2 sensor is responsible for the knock at idle, but I do not have access to Chrysler diagnostic information for the second code.
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Friday, August 6th, 2010 AT 4:11 PM

7 Replies

Tiny
MERLIN2021
  • EXPERT
Do you have both actual codes? Please post them. Pxxxx
this will allow me to try to look up the dealer code, and pinpoint the O2 sensor involved Your truck has three O2's so all info will help.
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Friday, August 6th, 2010 AT 9:23 PM
Tiny
PUDDLES1976
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The first is P0132. O2 sensor voltage too high (Bank1, Sensor1)
The second reads on my Scanner as - $D1 Manufacturer specific. No other P type code with it. That is what stumped me.
The Truck knocks slightly at idle. Does misfire. Running about 205-210 degrees (it is 98 here). Slight "bucking" on slow acceleration. Hope all this gives enough insight to nail this down.
Thanks,
Dale Miller
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Saturday, August 7th, 2010 AT 12:54 PM
Tiny
MERLIN2021
  • EXPERT
Heated Oxygen Sensor (HO2S) To test heating element, disconnect HO2S connector. Measure resistance between 2 White wire terminals at sensor connector. If resistance is not 5-7 ohms, replace sensor. To test sensing circuit, see the TESTS W/CODES - 5.2L article.
TEST TC-62A - LEFT/UPSTREAM O2 SENSOR SHORTED TO VOLTAGE 1. Warm engine to normal operating temperature. Wait 4 minutes with engine running. Using scan tool, read left/upstream Oxygen Sensor (O2S) voltage. If voltage is more than 1.5 volts, go to step 5). If voltage is 1.5 volts or less, go to next step. 2. Wiggle wiring harness and connector at left/upstream O2S while monitoring left/upstream O2S voltage. If voltage increases to more than 1.5 volts at any time while wiggling wiring harness, repair wiring harness and connector for intermittent short to voltage or open circuit as necessary and perform TEST VER-2A. If voltage does not increase to more than 1.5 volts at any time, go to next step. 3. Conditions required to set DTC is not present at this time. LEFT/UPSTREAM O2S SHORTED TO VOLTAGE DTC sets if left/upstream O2S voltage is more than 1.5 volts. Possible causes are: left/upstream O2S wiring shorted to voltage, dirt or moisture in connectors causing voltage tracking, defective connections, defective left/upstream O2S or PCM. Go to next step. 4. Inspect all related wiring and connectors. Repair wiring and connectors as necessary and perform TEST VER-2A. If wiring and connectors are okay, test is complete. Perform TEST VER-2A. 5. Disconnect left/upstream O2S connector. Inspect connector/terminals for damage. Repair connector/terminals as necessary and perform TEST VER-2A If connector and terminals are okay, go to next step. 6. Using scan tool, read left/upstream O2S voltage. If voltage is more than 1.5 volts, repair short to voltage in left/upstream O2S connector, signal circuit and perform TEST VER-2A. If voltage is 1.5 volts or less, perform TEST TC-103A. NOTE: For connector terminal ID, see the CONNECTOR IDENTIFICATION DIRECTORY. For wiring diagram, see WIRING DIAGRAMS - 5.2L article.

$D1= this is telling you which module is showing this fault, so $D1 is the PCM and we hope both clear when the short is fixed.
150,000 miles, this one is overdue for all O2 sensors to be replaced.
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Saturday, August 7th, 2010 AT 5:11 PM
Tiny
PUDDLES1976
  • MEMBER
Sorry for not getting back sooner (My internet was out for a few days now) I can only find 2 O2 sensors on this truck. 1 before the Catalyst, and 1 after it. I have examined the harness and there is no apparent damage. I will take a printout of your test procedure and get readings and get back to you with what I have found.
I was wondering could the third O2 sensor be on the engine itself because I can find no location for one on either Exhaust Manifold.
Where should it be?
Thanks,
Dale Miller
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Tuesday, August 17th, 2010 AT 3:03 PM
Tiny
MERLIN2021
  • EXPERT
On most, but not all V type engines, there are three on single exhaust and four on dual exhaust(factory installed)
You may have a two sensor setup, a bit less accurate but still works. Knocking engine can cause the knock sensor to pick up the knock, this will cause the PCM to retard timing. This would result in reduced power and possible bucking. Make sure the knock isn't mechanical, like a bad crank journal or piston wrist pin slapping. The other question now is, what engine size do you have? Liters?
3.9? I think yours has three sensors, One on each side of the "Y" pipe and one after the cat.
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Wednesday, August 18th, 2010 AT 1:10 PM
Tiny
PUDDLES1976
  • MEMBER
The engine is a 3.9L. Both front and rear O2 sensors read 0 Ohms across the white leads with them disconnected. I will get new ones (since reading was less than 5-7 Ohms) then clear the codes and see what happens. Hope this does it.
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Friday, August 20th, 2010 AT 12:37 PM
Tiny
MERLIN2021
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Let me know how you make out.
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Friday, August 20th, 2010 AT 1:08 PM

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