What causes the p0171 code to run too lean?
When the P0171 code sets, the oxygen sensors are detecting too little oxygen in the exhaust (running “lean”) and the control module is adding more fuel than normal to sustain the proper air/fuel mixture. Vacuum leaks ( intake manifold gaskets, vacuum hoses, PCV hoses, etc.)
What does the p0131 code on bank 1 mean?
Essentially the same as P0136 and P0137 , a P0131 code refers to the first oxygen sensor on Bank 1. P0131 means the O2 oxygen sensor’s voltage remained low for longer than 2 minutes. This, is interpreted by the ECM as a low voltage condition and sets the MIL.
When does the PCM set the p0134 code?
When the PCM determines that the time it took for the sensor to warm up is greater than one minute or that the voltage is inactive (not reading outside 391-491 mV it views the sensor as inactive or open and sets the P0134 code. One or more of the following may occur: Check engine light illumination
What’s the trouble code on my Chevy Silverado?
1996 Chevy Silverado, V8, 5.7L, 130k miles The engine runs and idles ok. But when I accelerate hard, it lacks power at higher RPM (5000). At this point, the dummy light starts blinking (according to the manual it means misfire) and then goes steady after normal driving. The codes are P0131, P015…
What causes the p0171 code on a GMC Sierra?
The P0171 code could also be caused may be caused by one or more of the following: debris on MAF sensor causing an incorrect reading, improper oil level, low or high fuel pressure or Engine Control Temperature (ECT) Sensor reading inaccurate. There is a factory service bulletin for the following GMC models: 2000-2008 GMC Sonoma 2000-2008 GMC Sierra
Where can I Find my GM trouble code?
If you own a 1982 to 1995 GM car or truck, you just might be able to read your trouble codes for free! If you have a connector like this under your dash, read on… (note: this connector may have a black plastic cover over it, so also look for a cover shaped like this, sorry for the messy wires here)
What does code 12 mean on GM OBD?
The system will enter the diagnostic mode. In this mode, the computer will display a Code 12, three consecutive times, by flashing the “CHECK ENGINE”, “SERVICE ENGINE SOON” or “MALFUNCTION INDICATOR LAMP” or light. A Code 12 consists of one flash, a short pause, then two flashes in rapid succession.
When did GMC take over rapid and reliance?
Shortly afterwards, the GMC brand name replaced the Rapid and Reliance brand names on all trucks then being produced. A copyright for the “GMC” trademark, which had been applied for earlier, was granted later that same year. By 1913 all Rapid and Reliance trucks were formally branded as GMC branded truck models.