Chevrolet Equinox overheating and stalling issue with multiple error codes P0703, P0727, P0562, P0171, and P0520 on Chevrolet Equinox

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

Some Chevrolet Equinox owners report experiencing overheating and stalling issues, along with multiple error codes such as P0703, P0727, P0562, P0171, and P0520. These overheating problems can lead to significant engine damage if not addressed promptly, often stemming from fuel system, air intake, or ignition system issues, with fuel system problems being the most prevalent. Additionally, stalling can occur due to low oil levels, which may result in engine lockup, or issues with the idle air control (IAC) valve that regulates engine speed at idle. The reported error codes provide diagnostic insights into specific vehicle problems, including transmission control module issues (P0703), engine speed sensor malfunctions (P0727), low voltage concerns (P0562), lean fuel mixtures (P0171), and engine oil pressure sensor circuit issues (P0520). To resolve these concerns, owners are advised to conduct thorough diagnostics, address underlying causes of overheating, maintain regular oil checks, and consult qualified mechanics for accurate repairs.

2 people reported this problem
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Chevrolet Equinox vehicles with this problem

1 model year affected
Average mileage: 2,770,000 miles
(2,770,000 - 2,770,000)

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