P0491 Demystified Comprehensive Diagnosis and Repair Blueprint

Ffs love the car… but these issues lol!! Left engine mount leaking needs replacement, front controll arms bushings torn, then P0491 air ... P0491 code means there is a problem on the side of the engine which contains cylinder #1 due to a bad air inlet, faulty wires, relay, pump, or fuse. The engine to shut off randomly while driving at lower speeds and at idle...it is intermittent...but usually shuts off within 10-20 mins of driving. The dual codes indicate a system failure. A system failure can be due to one of the following: 1) Air pump failure - This is a fairly common ... Performed SAI Self Test: Failed. Monitored input and output of secondary air pump. Was able to confirm activation of air pump and adequate flow. The air injection pump is failing or the fuse has blown. It's a high-current fuse (40A if I recall). For troubleshooting, I would look from the load side of ... Since this just started after replacing your head lights and the secondary air pump is usually located behind or just under one of the head ... I'm getting code P0491–Secondary Air Injection System Insufficient Flow Bank 1. I've cleared it twice and it keeps coming back. Does anyone know ... Secondary air injection is an emissions component on PZEV models that isn't related to engine operation - MAF not related at all. Electric air ... P0491 and P0492 indicate that you have insufficient air injection flow into the exhaust manifolds. The oxygen sensors are looking for a leaner ...