2003 Dodge Intrepid. Acceleration problems & engine light flashing

Tiny
SUNLOVERJAM
  • MEMBER
  • 2003 DODGE INTREPID
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 157,000 MILES
2003 Dodge Intrepid 2.7 lit. Engine. Sometimes the car will not want to accelerate past 20mph when first started and the check engine light will flash. It will eventually work itself out. Also, it idles a bit rough right before this will happen. Any ideas?
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Thursday, January 20th, 2011 AT 4:52 AM

3 Replies

Tiny
CARADIODOC
  • EXPERT
There are various ways the Check Engine light will act depending on the severity of the problem. The most serious is when it is flashing. That is very rare and means stop the engine right now before serious damage occurs to the catalytic converter. It is overheating due to excessive unburned fuel entering the exhaust system.

Anytime the Check Engine light turns on while driving, there will be a diagnostic fault code stored in the Engine Computer. Having that code read is the place to start. It will indicate the circuit or system with the problem, not necessarily the defective part. Many auto parts stores will read those codes for free. Don't put that off too long. If the problem doesn't act up again in the time you start the engine 50 times, the code(s) will erase automatically and that valuable information will be lost. Disconnecting the battery or running it dead will also cause the codes to erase.

Caradiodoc
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Thursday, January 20th, 2011 AT 5:24 AM
Tiny
SUNLOVERJAM
  • MEMBER
Yes, I do have codes. It is throwing P0132, P0300, P0441 and the engine light will only flash every now and again (always when the car will not accelerate) Thanks for the help so far.
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Thursday, January 20th, 2011 AT 6:00 AM
Tiny
CARADIODOC
  • EXPERT
Those codes are related to three different circuits so a logical place to start would be with the wiring harnesses and connectors. The first code means the signal wire for the left front oxygen sensor is shorted to voltage. The first suspect would be the harness fell down onto hot exhaust parts and melted to the feed wire for the O2 sensor heater. Next, use the scanner to view live sensor data and see what that O2 senor is reading for voltage. If it is above about one volt, start unplugging things to see what it takes to make the voltage go back down to normal.

Caradiodoc
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Thursday, January 20th, 2011 AT 6:54 AM

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