I have a 2002 Chevy Tracker, 2.0L, that i drive every day. It's running like poop; rough idol, occadional stalling, engine hesitation, slightly low on power. My codes are p0442, p0176, and p0121.... the p0442 has been on forever... the previous owner suspected catalytic converter and it never had any affect on the way the car ran.... the new codes surfaced when the car started running poorly. I've replaced the spark plugs, cleaned the throttle body and pcv valve, replaced throttle sensor... no improvement. Any ideas?

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I have a 2002 Chevy Tracker, 2.0L, that i drive every day. It's running like poop; rough idol, occadional stalling, engine hesitation, slightly low on power. My codes are p0442, p0176, and p0121.... the p0442 has been on forever... the previous owne...

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22/10/2021 11:15 am

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I have a 2002 Chevy Tracker, 2.0L, that i drive every day. It's running like poop; rough idol, occadional stalling, engine hesitation, slightly low on power. My codes are p0442, p0176, and p0121.... the p0442 has been on forever... the previous owner suspected catalytic converter and it never had any affect on the way the car ran.... the new codes surfaced when the car started running poorly. I've replaced the spark plugs, cleaned the throttle body and pcv valve, replaced throttle sensor... no improvement. Any ideas?

Bananadine

(@bananadine)

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22/10/2021 12:10 pm

My 2003 Tracker 20.L started doing the same thing. I cleaned the MAF and MAP (located on top of the valve cover at rear) sensors, new air filter, fuel filter (behind passenger side tire) and replaced the timing chain. Runs great. Also check cam position sensor for function and proper adjustment