I have a charging problem with a 2002 X Type manual 2.5L. I took my car for an injector cleaning, due to a "misfire", and when test driving the vehicle the battery light came on and the car started running lumpy. My mechanic found code P1629, plus a few others and advised me to change the alternator
He was only getting 12V at the battery with it running. . I replaced it with a used unit from an automatic I had broken for spares, but the light still would not go out .I fitted a voltmeter in the power outlet and was getting 14V, but after abut 10 minutes the voltage dropped to 12.3, but the light was on al the time.
JA: Do you have a scan tool to read the codes?
Customer: I took it back to the garage and they have checked some things. It is still giving a P1629 code and it charges at 14 volts after starting, then drops to 12ish volts after 10 minutes or so. The light stays on all the time.They have been scanning and checking codes and they can reset the light, but it comes back on.It is still there tonight and they are thinking I should fit a new alternator - or it could be the PCM. I changed the belt with the alternator. Im just worried about the same code with 2 different alternators may suggest a different problem. Any ideas or advice?
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: Its at the garage, but I work with them to fix stuff
JA: Anything else you think the mechanic should know?
Customer: I think you have it all for now.
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Jaguar Mechanic about your situation and then connect you two.