雪佛兰乐风报 P0171 故障码维修案例
<p style="box-sizing: border-box; margin-top: 1.25pt; margin-bottom: 0pt; margin-left: 1.35pt; font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 12pt; line-height: 1.1; color: rgb(0, 0, 0); outline: 0px !important;"><span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;">故障现象:</span></p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"></p><p style="box-sizing: border-box; margin: 1.3pt 105.7pt 0pt 1.35pt; font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 12pt; line-height: 1.15; color: rgb(0, 0, 0); outline: 0px !important;"><span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;">一辆雪佛兰乐风，车主反应汽车故障灯点亮，无明显症状。</span> <span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;">维修过程:</span></p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"></p><p style="box-sizing: border-box; margin-top: 1.3pt; margin-bottom: 0pt; margin-left: 1.35pt; font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 12pt; line-height: 1.09; color: rgb(0, 0, 0); outline: 0px !important;"><span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;">首先连上故障诊断仪，读取故障码为</span> <span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;">P017</span><span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;">1,故障码含义为燃油调整系统稀。</span></p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"></p><p style="box-sizing: border-box; margin-top: 3.9pt; margin-bottom: 0pt; font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; line-height: 21.85; color: rgb(0, 0, 0); text-indent: 0.85pt; outline: 0px !important;"><span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;"><img alt="图片-雪佛兰乐风报 P0171 故障码维修案例-蛙趣网" fetchpriority="high" decoding="async" width="546" height="291" class="wp-image-577 size-full" src="https://wapq.cn/wp-content/uploads/2025/03/20250305231901567-20250305231901416-IM-2-291h.jpeg" imgbox-index="0" style="box-sizing: border-box; outline: 0px !important; height: auto; max-width: 100%; border: 0px; vertical-align: middle; max-height: 100%; display: block; margin: auto;"></span></p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"></p><p style="box-sizing: border-box; margin-top: 1.85pt; margin-bottom: 0pt; margin-left: 1.2pt; font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 12pt; line-height: 1.1; color: rgb(0, 0, 0); outline: 0px !important;"><span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;">然后我们读取数据流，发现怠速时长期燃油修正过高。如图：</span></p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"></p><p style="box-sizing: border-box; margin-top: 5.2pt; margin-bottom: 0pt; font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; line-height: 21.56; color: rgb(0, 0, 0); text-indent: 0.4pt; outline: 0px !important;"><span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;"><img alt="图片-雪佛兰乐风报 P0171 故障码维修案例-蛙趣网" decoding="async" width="544" height="287" class="wp-image-578 size-full" src="https://wapq.cn/wp-content/uploads/2025/03/20250305231902746-20250305231902182-IM-4-544w287h.jpeg" imgbox-index="1" style="box-sizing: border-box; outline: 0px !important; height: auto; max-width: 100%; border: 0px; vertical-align: middle; max-height: 100%; display: block; margin: auto;"></span></p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"></p><p style="box-sizing: border-box; margin: 2.1pt 0.6pt 0pt 1.05pt; font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 12pt; text-align: justify; line-height: 1.19; color: rgb(0, 0, 0); text-indent: 0.4pt; outline: 0px !important;"><span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;">尝试加几次油门，发现长期燃油调整有时甚至会高达</span> <span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;">30%，分析造成汽车混合气</span> <span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;">过稀的原因有：空气流量计故障、进气系统泄露、燃油压力低、喷油器堵塞、氧</span> <span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;">传感器信号故障等等。本着先简后难的原则， 我们观察数据流，怠</span><span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;">速时进气压力</span> <span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;">为</span> <span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;">32kpa,问题不大。接着我们接上汽油压力表，测得燃油压力为</span> <span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;">2.8</span><span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;">bar,这个压</span> <span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;">力对于有回油管的车来说是正常的，但对于没有回油管的车来说，燃油压力要保</span> <span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;">证在</span> <span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;">3.2bar 以上。为了验证我们的判断，我们把原车油管拔掉，接上吊瓶，将</span> <span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;">燃油压力调整到</span> <span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;">3.5bar,观察数据流，看到几分钟后，燃油修正就降下来了，因</span> <span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;">此证明我们的判断是正确的。（见下图）</span></p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"></p><p style="box-sizing: border-box; margin-top: 3.7pt; margin-bottom: 0pt; font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; line-height: 49.23; color: rgb(0, 0, 0); text-indent: 0.85pt; outline: 0px !important;"><img alt="图片-雪佛兰乐风报 P0171 故障码维修案例-蛙趣网" decoding="async" width="263" height="658" class="wp-image-579 size-full" src="https://wapq.cn/wp-content/uploads/2025/03/20250305231904255-20250305231904179-IM-6-263w658h.png" imgbox-index="2" style="box-sizing: border-box; outline: 0px !important; height: auto; max-width: 100%; border: 0px; vertical-align: middle; max-height: 100%; display: block; margin: auto;"><span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;"><img alt="图片-雪佛兰乐风报 P0171 故障码维修案例-蛙趣网" decoding="async" width="280" height="656" class="wp-image-580 size-full" src="https://wapq.cn/wp-content/uploads/2025/03/20250305231907108-20250305231907829-IM-8-280w656h.png" imgbox-index="3" style="box-sizing: border-box; outline: 0px !important; height: auto; max-width: 100%; border: 0px; vertical-align: middle; max-height: 100%; display: block; margin: auto;"></span></p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"></p><p style="box-sizing: border-box; margin-top: 5.45pt; margin-bottom: 0pt; margin-left: 1.35pt; font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 12pt; line-height: 1.1; color: rgb(0, 0, 0); outline: 0px !important;"><span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;">故障排除:</span></p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"></p><p style="box-sizing: border-box; margin-top: 1.3pt; margin-bottom: 0pt; margin-left: 1.25pt; font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 12pt; line-height: 1.15; color: rgb(0, 0, 0); outline: 0px !important;"><span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;">更换燃油泵总成，清除故障码，观察数据流恢复正常</span><span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;">，长短期燃油修正都是零。</span> <span style="box-sizing: border-box; font-size: 10.5pt; outline: 0px !important;">路试一段时间后，故障排除，一切正常，交车。</span></p><p></p>
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