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Matt
Matt, Mechanical Engineer
Category: Ford
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Experience:  BEng hons Mech engineering, in auto industry 22 years
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Battery warning light comes on the Transmission Warning and

Customer Question

Battery warning light comes on the Transmission Warning and car shuts down this happens twice while travelling at speed. very dangerous local ford dealers say cant find anything wrong.
Submitted: 2 years ago.
Category: Ford
Expert:  Shantal-Mod replied 2 years ago.
Hello,

I'm Shantal and I'm a moderator for this topic.

We have been working with the Experts to try to help you with your question. Sometimes it may take a bit of time to find the right fit.

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Expert:  Matt replied 2 years ago.
Hello

1st check that the main battery cables are on tight and the terminals are clean and bright. Do the same for the engine / gearbox earth strap

This sounds like an electrical actuator or sensor at fault .Usually when you can cycle the ignition key on / off and then restart the engine and the fault is gone temporarily this indicates that this is an electrical component causing this issue.

This could be a wiring issue as things tend to expand when hot and its possible a poor or partial electrical connection is being pushed apart on one of the major sensors so check the connection plug and wiring to the following;
Airflow meter
Crank position sensor
Cam position sensor
O2 sensor
Throttle position sensor


Also worth checking the connections to the fuel pump for the same reason - unplug each in turn and give them a good squirt of switch / contact cleaner - Not WD40

and also unplug and inspect the main power relays and fuses for signs of overheating or corroded terminals - so the ones for the ECU and the fuel pump

And also unplug the wiring loom connections in the engine bay one at time and inspect for corroded or recessed pins.

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