So car has been running rough lately

ANONYMOUS

MEMBER
2004 SUZUKI VERONA
87,000 MILES

So car has been running rough lately. So rough that cant drive. When I took it to Firestone they told me the ECM/PCM was bad. At that time the only code I had was PO430. Now I also have PO403, PO404, P1382, PO305, PO650. So they question is could all but the PO430 be cause by the supposed bad ECM/PCM? And other that taking the car to a dealer or repair shop is there any way to test it? I did find a $1500 ECM for $110 at a wrecking yard and called a shop to find out price to program it and is also $110. So should I spend the money on a new one or save $1400 and get a used?

2 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Have the EGR valve, Oxygen sensors and Catalytic converter checked out-Have the exhaust system backpressure tested-start here

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Friday, October 19th, 2012 AT 3:18 AM

KHLOW2008

MECHANIC
41,814 POSTS

� P0305 � Cylinder 5 Misfire Detected
� P0403 � Exhaust Gas Recirculation Circuit Malfunction
� P0404 � Exhaust Gas Recirculation Circuit Range/Performance
� P0430 � Catalyst System Efficiency Below Threshold (Bank 2)
� P0650 � Malfunction Indicator Lamp (MIL) Control Circuit Malfunction
� P1382 � Wheel Speed Sensor Malfunction

With so many codes present, I doubt it is a faulty PCM. I would suggest getting a second opinion. Check the PCM harness connector for looseness, presence of water or contaminations. Ensure all ground circuits are good. Erase the trouble codes and recheck if any comes back.

The EGR system could cause the first 4 fault codes.