What is your question?
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What is your question?
I believe it to be a bad bank one oxygen sensor question is,is it upstream or downstream and is the downstream sensor the one behind the engine.P1135 tells me its a fuel sensor heating circuit malfunction
3 Replies
Upstream between the engine and firewall. P0300 - P0305 = misfires on cylinders 1, 3, & 5. Along with replacing the O2 sensors, you might clean or replace the Variable Valve Timing oil control valve filters.
Replace both unless you had one changed recently, they function as a unit. Clear codes after installation one fault code will set other codes when it becomes a fuel and air issue. (which it does.) If you don't have a scan tool, stop by any Auto Zone, Advance Auto Parts etc. and they should do it free of charge. Good Luck, Kool Tool. Downstream is the lower one.
Find and fix the cause of the misfire first , maybe???? And replace the O2 sensor with the faulty heater.
