Twenty more codes with walkthroughs: oil, relays, charging

Three new walkthroughs cover oil pressure, the fan relay and charging. Codes whose page used to end in nothing: 103 instead of 123.

6 September 20261 min

Twenty more codes with walkthroughs: oil, relays, charging

We continue closing the blank spots in the reference — the code pages where there was nowhere to go after the description.

Oil pressure — 5 codes. The key point: the red oil lamp and codes P0520–P0524 come from different devices and call for different reactions.

Fan, A/C and fuel pump relays — 8 codes. With checks that need no instruments: swap the relays over, listen to the pump, watch the idle when the A/C button is pressed.

Charging and vehicle voltage — 7 codes. A one-minute alternator check using a single reading in the app: control module voltage.

Each of the twenty codes now leads from its own page to a walkthrough, and the walkthroughs are linked to the symptoms, lamps and live readings they discuss.

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