Ken,
On the P0351...you'll need a MSD 8910 Tach Adapter. (This is a common
problem if you're running a MSD system.) But here's the actual P-Code
descriptions for both:
On the P0351:
P-0351 Ignition Coil #1 Primary Circuit
SYMPTOM
P-0351 IGNITION COIL #1 PRIMARY CIRCUIT
WHEN MONITORED
With battery voltage greater than 8 volts during engine cranking or
greater than 12 volts with engine running, and with engine rpm less than
2016, and none of the coils in dwell when checked.
SET CONDITION
Peak current is not achieved with battery based dwell plus 1.5 msec of
diagnostic offset. It takes less than 3 seconds during cranking or up to
6 seconds while running to set.
POSSIBLE CAUSES
Ignition coil #1 driver circuit short to ground
ASD relay output circuit open
Ignition coil #1 driver circuit open
Ignition coil connector observable def
Ignition coil def
PCM def (#1 primary circuit)
On the P0138:
P-0138 1/2 O2 Sensor Shorted to Voltage
SYMPTOM
P-0138 1/2 O2 SENSOR SHORTED TO VOLTAGE
WHEN MONITORED
With the engine running for more than 2 minutes and coolant temperature
above 170 degrees F .
SET CONDITION
The oxygen sensor voltage is above 1.2 volts .
POSSIBLE CAUSES
1/2 O2 sensor signal circuit shorted to voltage
1/2 O2 sensor wiring harness observable def
1/2 O2 sensor wiring harness or connector intermittent def
1/2 O2 sensor connector terminals observable def
1/2 O2 sensor defective
- Bernd
-----Original Message-----
From: owner-dakota-truck@BUFFNET.NET
[mailto:owner-dakota-truck@BUFFNET.NET] On Behalf Of Ken Allgood
Sent: Wednesday, November 07, 2001 6:57 PM
To: dakota-truck@BUFFNET.NET
Subject: DML: New Scan Tool: Trouble codes = New coil/ignitiion system?
Ok, so I got my Tricom scan tool yesterday. WOOHOO!! I've already put
this baby to test on my friends 96 ranger cause he had a MIL. Found the
code, found the problem, and I turned off his MIL. cool! Get it hooked
up on mine, because i've had intermittent MIL code, even though it's
currently off.. Guess what, got 2 codes:
1) P0351 (Ignition System or Misfire): Ignition Coil A
Primary/Secondary Circuit Malfunction
2) P0138 (Fuel and Air Metering): O2 Sensor Circuit High Voltage (Bank 1
Sensor 2)
Dakota: 97 CC SLT 5.2L Mods: 180 t-stat, Quick-D intake, Hypertech
PCM, Gibson Cat-back
Problem #1: Sounds like my ignition coil? If so, what's the best one
to go with? Might be a good idea to do Coil, wires, etc??
Problem #2: Sounds like 2nd O2 sensor going out (1 was replaced a year
ago). How difficult is it to replace the sensor? Anyone know which one
the Sensor 2 is?
Thanks for the help... Oh yeah, anyone else got their scan tool yet?
loving mine!! found out my speedo is 2mph off.. going 37mph when needle
says i'm doing 35... oops!
Ken Allgood
97 cc SLT 5.2L
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