Engine will crank but not start with codes P0261, P0267, P0270, P0264, p003, P2257 and P0414

HEATHER1223

MEMBER
2004 VOLKSWAGEN PASSAT
2.8L
4 CYL
2WD
MANUAL
208,000 MILES

Radiator was replaced about 150 miles ago. Car was running fine. Then check engine light came on and car wouldn't start if you tried to start it immediately after turning it off. If you waited a minute or two or three it would start right back up. Then three weeks or so later car wouldn't turn over the first time I would turn the key but if I pumped the gas one time the second time, I turned the key the car would start right up. Then bypass hose split, and car overheated. Car will not turn over at all now but is trying to. Friend says it sounds "starved for gas" gas tank is completely full. Codes showing are p0261, p0267, p0270, p0264, p0037, p2257, p0414. Can you please help me?

Wednesday, November 10th, 2021 AT 7:40 AM

1 Reply

JACOBANDNICKOLAS

MECHANIC
110,176 POSTS

Hi,

Did all of these codes show up at once? If you look below, four of the codes are related to low voltage. Code P2257 isn't shown for this vehicle, but it is a secondary air injection code that is also showing low voltage. The P0414 is an O2 sensor that has a voltage issue as well.

I attached the wiring schematics below for the powertrain control circuits. I highlighted the wiring I need you to inspect. Now, since we get a low voltage signal to everything, the first thing I need you to check is the secondary air pump fuse located in the fuse bracket on the battery cover. That fuse powers the air pump, and the fuel pump relay which in turn powers fuse 32 for the injectors. Now, when testing fuses, also make sure there is power to and from them.

Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If the fuses test good and have power, then I want you to go to the fuel injectors (specifically cylinders 1-4) and check the black wire with a blue tracer at each injector. Have the key in the run position when testing.

Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-wiring

Overall, if you had a hose burst, there is a chance it caused the secondary air injection fuse to fail. As a result, it caused the other issues.

Let me know what you find or if you have other questions.

Take care,

Joe

See pics below.

Images (Click to make bigger)