| From | Message |
Red99DakR/T
Dodge Dakota
JOIN HERE
12/14/2006
07:55:42
|
 Subject: Check Engine light
IP: Logged
Message:
I've put questions about my Check Engine light on here before, but now have additional information. Here's the scoop: I have been getting that Check Engine light ever since I got my truck. When I check the codes, all I get is an error on the checker. Thinking it may be the O2 sensor, I changed the up stream on and it still comes back. Actually, it only comes back when I have driven for a while and either am stopping or have stopped at a stop sign. My thought is that I may have an air leak with the gas tank. I just want to get other views before I rip my bed off to check.
|
Kowalski
GenIII
12/14/2006
09:45:30
| RE: Check Engine light
IP: Logged
Message:
Might want to try a different code reader. I wouldn't jump into thinking its the gas tank yet; even if you find out its an evaporative leak code it could be cracked vapor lines or a bad gas cap...
Lead, follow, or get out of the way
|
Red99DakR/T
Dodge Dakota
JOIN HERE
12/14/2006
11:07:45
| RE: Check Engine light
IP: Logged
Message:
I have already changed the cap, so I know it's not that. I have also used different readers and the self diagnoses, both in vain. When I originally got the error, even the reader at the Dodge Dealer couldn't get a definitive reading. I have been trying to diagnose this problem for 2 years now and no-one has given me any answers.
|
Manny
Dodge Dakota
JOIN HERE
12/14/2006
14:08:17
| RE: Check Engine light
IP: Logged
Message:
"even the reader at the Dodge Dealer couldn't get a definitive reading."
Just a guess, but if the PCM won't even tell the Dodge DRB scantool what the problem is, that might be a clue that the PCM has a fault.
|
Red99DakR/T
Dodge Dakota
JOIN HERE
12/19/2006
11:34:11
| RE: Check Engine light
IP: Logged
Message:
Ok, I finally changed my up stream O2 sensor and I finally get a code: P0420 Now with that, it points at the Cat. but since it is an after market exhaust from the cat back, could it be the down stream O2 Sensor?
|
svc man info
Dodge Dakota
JOIN HERE
12/19/2006
13:26:32
| RE: Check Engine light
IP: Logged
Message:
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P0420-CATALYST 1/1 EFFICIENCY.
When Monitored and Set Condition:
P0420-CATALYST 1/1 EFFICIENCY
When Monitored: After engine warm up to 70°C (158°F), 180 seconds of open throttle
operation, at a speed greater than 18 mph and less than 55 mph, with the engine at
1200-1700 rpm and MAP vacuum between 15.0 and 21.0 inches of mercury (Hg).
Set Condition: As catalyst efficiency deteriorates, the switch rate of the downstream O2
sensor approaches that of the upstream O2 sensor. If at any point during the test the
switch ratio reaches a predetermined value a counter is incremented by one.
P0430-CATALYST 2/1 EFFECIENCY
When Monitored: Engine running.
Set Condition: The Powertrain Control Module doesn’t recoginize the Catalitic Converter
warming up effenciently.
POSSIBLE CAUSES
GOOD TRIP EQUAL TO ZERO
VISUALLY INSPECT CATALYTIC CONVERTER
EXHAUST LEAK
ENGINE MECHANICAL CONDITION
AGING O2 SENSOR
CATALYTIC CONVERTER
|
Red99DakR/T
Dodge Dakota
JOIN HERE
12/23/2006
02:59:46
| RE: Check Engine light
IP: Logged
Message:
After 2 years, the Check engine like has not come back on...... Finally..... Thanks for all the help....
|
| | P 1 |
|
Post a reply to this message:
Username Registration: Optional
All visitors are allowed to post messages
|
