Question about 2003 Dodge Stratus

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2003 Dodge Stratus Sxt 2.4L, 5-speed manual 85000 miles My check engine light is on and I failed inspection, which returned a P0135 code. We replaced the upstream O2 sensor, but I haven'r put enough mileage on the car to reset yet. Thought I could extend inspection allowance by failing again - not in Jersey! Well, it returned P0135 AND P0303. What's up with that?! I'm out of work and need cost-effective (ie; CHEAP!) ideas to solve this, plus I need to load 150 miles on car quick! Thanx and Happy New Year!

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The oxygen sensors have four wires. Two are for the power circuit for the heater within the oxygen sensor, they only work when hot and can not wait for the exhaust to get warmed up. The other two wires are for the oxygen sensor circuit. Your error code p0135 indicated that the heater power circuit was open. This was either due to a faulty heater element within the sensor or there was a break in the circuit due to dirt in the connector or a fractured wire. Your code P0303 is quite separate and is due to misfire on cylinder 3 (the last digit). Check the spark plug, the coil on plug socket for any shorting.

Posted on Dec 30, 2010

  • twinkler1 Dec 30, 2010

    Thanks Joe! We replaced the O2 sensor after getting the original P0135 code, so I imagine the second P035 code is because I haven't put enough miles on the car to reset the computer after the repair, right? I will check the plug and coil for the other code, tho!

  • Joseph Prosser Dec 31, 2010

    If varies between car manufacturers as to how long it takes to reset the codes. Sometimes switching on and off the car five times will reset the computer if no further errors exist. On others disconnecting the battery negative terminal for five minutes will clear the codes. 'Autozone' can be helpful in advising on clearing codes. Glad to be of help



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