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1995 Ford Taurus Other - Engine
Question: KOEO key on engine off test returns fault code 337 "EGR sensor circuit above maximum voltage" Does this mean I need to replace the EGR valve position sensor? If not, what does it mean? engine is 3.2L SHO, VIN "P"
thanks
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Technican: Hi,
This code can set from a defective EGR sensor, or a loose connector, or a broken Brown/Light green wire or Gray/red wire, or a defective computer. Sensors DO commonly go bad, I often keep one in stock.
Owner: You offered several possible causes, from a bad EGR valve position sensor to broken wires to a bad computer. Are the broken wire/bad connector causes consistent with the voltage being high? It seems logical that broken wire/bad connector would produce an open circuit or high impedance that would lead to low voltage. Do you agree with this logic, or do I really need to check for broken wire/bad connector? If the cause is the last one in your list, bad computer, how do I check for this?
Technican: You are partly right. As I said, a bad sensor is by far the most common, but a broken ground wire (gray/red) or a broken signal wire (brown/green) can cause the computer to see 5 Volts which is considered high voltage. Here's How To Get Guaranteed Solutions In Minutes
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