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A code P0171 indicates the engine is running lean.
CausesA code P0171 may mean that one or more of the following has happened:
- The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
- There could be a vacuum leak downstream of the MAF sensor.
Possible solutions include:
- In the vast majority of cases, simply cleaning the MAF sensor does the trick. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
- Inspect all vacuum and PCV hoses, replace if necessary
- Check for a dirty fuel filter and proper fuel pressure as a weak fuel pump can also be the culprit.
What else can I help you with?
Is a 1999 silverado engine the same as a 2002 silverado engine?
yes in a way but it has been modified NEW ANSWER: The engines are not even CLOSE to being the SAME. Chevy compleaty REDISIGNED the engine blocks and transmissions in late 1999
What is the torque for the flywheel on a 1999 Chevy Silverado?
------- 1/19/09 --------- Greetings, which size engine do you have?
Is the transfer case from a 2000 Chevy Silverado interchangeable with a 1999 Chevy Silverado?
Yes as long as your variables are the same as in same engine, transmission, 2 or 4 wheel, etc.
Where is my hood latch located on a 1999 Chevy Silverado?
where is my hood latch located on my 1999 Chevy silverado pickup
How many quarts of oil does a 1999 Chevy silverado v-8 engine hold?
6 quarts
Where is the brake light switch on a 1999 Chevy Silverado?
what does it mean if my brake light is blinking on and off when its pushed down in my 1999 Chevy silverado
Where is the oil filter located on 1999 Chevy silverado v8 5.3l?
under the engine, driver side by the oil pan.
Does the 1999 Chevy C1500 Silverado have traction control?
no.
Can your 1999 Chevy silverado run without catalystic conveter?
It will run, But not right and the check engine light will come on. It needs the converter.
Can you replace a 305 Chevy in a 1999 silverado for a 350 Chevy?
Yes, you sure can.
How do you disable security system in a 1999 Chevy Silverado 2wd Chevy Silverado?
To disable the security system in a 1999 Chevy Silverado, insert the key into the ignition and turn it to the "On" position without starting the engine. Leave the key in this position for about 10 minutes until the security light turns off. Afterward, turn the key back to the "Off" position and then start the engine. If issues persist, you may need to consult the owner’s manual or a professional for further assistance.
Will the fender flares of a 1993 Chevy Silverado fit a 1999 Chevy Silverado?
Yes they will as long as the 99 is not the new body style.
