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.