Code told me to change mas air flow sencer and map sencer and I did and still runing bad and sending same codes still
Feb 22, 2014 at 2:41 PM
2003 GMC Sonoma truck running bad
2003 GMC SONOMA
JASON520SEXTON
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- 1 POST
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CARADIODOC
- ✓ASE Certified Mechanic
- 34,321 POSTS
Diagnostic fault codes never say to replace parts or that they're bad. They only indicate the circuit or system that needs further diagnosis, or the unacceptable operating condition. When a part is referenced in a code, it is only the cause of that code about half of the time. You first have to check the wiring to that part. This is especially true when you have two or more related codes. Look for what they have in common, like 5.0 volt feed and ground wires. The place to start is with a scanner that lets you view live data. The MAP sensor voltage must be between 0.5 and 4.5 volts. That's the easiest circuit to diagnose.
It's also necessary to know the exact fault code numbers. There can be over a dozen related to one sensor, and they mean very different things.
It's also necessary to know the exact fault code numbers. There can be over a dozen related to one sensor, and they mean very different things.
Feb 22, 2014 at 4:37 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.