Is there a problem with the p0641 code?

P0641 is a problem with the 5V Reference voltage for the sensors. Don’t replace any sensors. You need a volt meter (multimeter). If you don’t have one you can buy a cheap one like this: http://www.harborfreight.com/7-function-digital-multimeter-92020.html Key on, engine off. Go to the MAP sensor since it’s the easiest one to get to.

What does the p0641 code on a Silverado Sierra mean?

If I park at a store run in for a few minutes and come back out is when this long crank happens. The starter was replaced and this did not change anything. The P0641 code is related to the following sensors: MAP, FTP, A/C, APP, and CMP.

What are the symptoms of a p0641 sensor reference voltage?

Symptoms of a P0641 code may include: Failure of the transmission to shift between sport and economy modes Failure of the transmission to switch between all-wheel and two-wheel drive modes Failure of the transfer case to shift from low to high gear

How much does it cost to repair a p0641 Chevy?

Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins. The cost of diagnosing the P0641 CHEVROLET code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

Why do I have a p0171 code on my car?

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.

What causes the p0641 trouble code on a GM car?

GM has identified the cause of the P0641 to be a chaffed wire in the ECM wiring harness. The chaffing occurs because the ECM wiring harness is rubbing on the ECM bracket. Using the image here, locate the wire harness bundle from connector X1 at the ECM.

What does p0641 mean in reference voltage?

This usually takes the form of other codes that refer to a specific sensor or system, but note that this is not always the case. However, when code P0641 is present, whether other codes are shown or not, it always means that an open circuit exists in reference voltage circuit “A”.

How much does it cost to diagnose a p0641 code?

Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins. The cost of diagnosing the P0641 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour. When is the P0641 code detected?

Is the p0641 code related to the FTP sensor?

The P0641 code is related to the following sensors: MAP, FTP, A/C, APP, and CMP. I was thinking maybe my long starting is related to the FTP sensor because of these long starts? It is apparent to me this is an electrical issue, maybe a sensor or wiring shorting out causing an open circuit.