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Posts Tagged: P0721

Hyundai transmission codes

Fix Hyundai transmission codes Hyundai vehicles may set off the check engine light and the computer may retain any of the following Hyundai transmission codes P0715, P0716, P0717, P0720, P0721 and P0722. The problem may appear on the following models: 1999 and later Sonata 2001 and later Elantra 2001 and later Sante Fe 2001-2005 XG300/350 2006 and later Azera 2003 and later Tiburon 2007 and later Entourage. The problem may present itself as the following symptoms: • Check engine light on • Harsh P-R or P-D engagement shock • Transaxle … Read More

Dead gauges GM trucks

Fix Dead gauges GM trucks GM has issued a Technical Service Bulletin (1549143) for Dead gauges GM trucks 2001-05 Chevrolet Silverado and GMC Sierras equipped with the Allison LCT1000 transmission. The instrument cluster can be erratic, drop out, become inoperative, or result in a trouble code of P0721, C0237, P0500, C0055. In addition, the transmission may exhibit trouble shifting. Also, the ABS light can illuminate. The problem may be caused by a bad vehicle speed sensor (VSS) or a damaged reluctor wheel. The Allison tranmission sends a speed signal to … Read More

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