Is the battery light lit on the insturment cluster ? The heavy gage wire on the back of the alternator should have B+ voltage , Both wires in the two wire connector should also have B+ voltage . Without battery voltage at any of these the alternator will not work .
SOURCE: alternator problem
one cavalier i worked on had a loose wire on the starter solonoid where the battery lead is hooked. have also had corrosion and broken wires on other gm cars do the same thing
SOURCE: 1995 Saturn 4door singlehead cam
The coolant temp sensor probably cracked and reading wrong. On drivers side of head. The lower one, with 2 wires going to it.
SOURCE: possible bad alternator?
I went through three alternators before we found a good one for our saturn sl2. Now she has been good for two years. All I did was go back to where we bought it from, they hooked up the alternator to a machine and gave us a new one when it read that it was faulty.
SOURCE: i have 2000 chevy impala 3.4 engine i have check
This indicates a fuel vapor leak in the EVAP control system. It means a very small leak has been detected. In fact, the leak can be from a hole as small as 0.04" in diameter. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.
code P0442 most likely means one or more of the following has happened:
With a P0442, the most common repair is to:
SOURCE: Ford 2003 Expedition EB. Check Charging System
Its probably the alternator. It will need to be tested on the vehicle with the engine running and the light illuminated. Measure the battery voltage with the engine running. It should be at least 13.5 volts. If it is lower have the alternator tested at a shop with a charging system tester.
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