# 2000 Volvo S70 Engine Light On

**URL:** <https://community.cartalk.com/t/2000-volvo-s70-engine-light-on/76132>\
**Category:** Maintenance/Repairs\
**Tags:** s70, volvo\
**Created:** [December 15, 2012, 2:33am UTC](https://community.cartalk.com/t/2000-volvo-s70-engine-light-on/76132 "2012-12-15T02:33:36Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![gagerite](https://avatars.discourse-cdn.com/v4/letter/g/f9ae1b/32.png) [@gagerite](https://community.cartalk.com/u/gagerite)\
**Post date:** [December 15, 2012, 2:33am UTC](https://community.cartalk.com/t/2000-volvo-s70-engine-light-on/76132/1 "2012-12-15T02:33:36Z")

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The Check Engine Light is on. Diagnostic Codes: P0722, P1618, and P1633. Do these mean the output speed sensor/connector wires should be replaced? Is this a DIY job?

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**Author:** ![shadowfax](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/shadowfax/32/13026_2.png) [@shadowfax](https://community.cartalk.com/u/shadowfax)\
**Post date:** [December 15, 2012, 3:45am UTC](https://community.cartalk.com/t/2000-volvo-s70-engine-light-on/76132/2 "2012-12-15T03:45:02Z")

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Check transmission ground wire, and then check the speed sensor wire. Only replace the wires if they’re actually bad. It could also be a bad transmission speed sensor and have nothing to do with the wires.