What is a secondary air pressure sensor?
A secondary air injection pressure sensor is used by the Powertrain Control Module or PCM to monitor the air flow from the air injection pump. The PCM supplies 5 volts to power the sensor and another 5 volts as a reference or signal while finally supplying the much needed ground on the third circuit.
Is VW 2.0 an interference engine?
The VW 2.0L 8V is an interference engine (a.k.a. non-clearance engine). If the VW timing belt fails, the timing belt system that links the cylinder head, camshaft, and crankshaft no longer run in sync. Close tolerance engine designs allow for the cylinder head valves to hit the top side of the pistons.
Is the secondary air injection system incorrect flow?
P0411-Secondary Air Injection System Incorrect Flow Detected… DTC P0411 P0137 P2096 P0301 P2270 are all showing up. So far I have replaced the Down stream Oxygen sensor and the secondary air intake control valve.
What kind of air injection does a Jetta have?
On 2005-2012 Jetta, Golf, Beetle, Passat and Rabbit models with the 2.5 CBTA-CBUA engine, the hose for the secondary air injection system can be contaminated by foreign particles. 2005-2012 Jetta, Golf, Beetle, Passat and Rabbit models with the 2.5L CBTA-CBUA engine.
When to replace a secondary air injection pump?
If you’ve already experienced engine stalling, poor acceleration, and a check engine warning light, then you need to have the secondary air injection pump checked out immediately. If it is proven to be the problem, have it replaced by a certified mechanic.
What are the symptoms of an air injection pump failure?
Below you’ll find the five most common symptoms of secondary air injection pump failure. If you notice at least two of the symptoms occurring, there’s a good chance you’re dealing with a faulty secondary air injection pump and you need to get it serviced right away.