engine check light is on

[jdogg1104]

today i just got a diagnosis test on my 92 Q45 and the guy wrote down 32 EGR system malfunction34 knock sensor or circuit51 open injector circuit

does anybody know how 2 fix these problems or what could be the problem?

[Q45tech]

Not spending enough on 90 day maintenance interval. The 15 cents per mile [$2,500-3,000 per year] [over last 14 years] you should be spending to maintain as new performance.

The EGR system is dirty and needs cleaningThe 2 Knock sensor are cracked and defective along with their harnessAn injectors is open or the connector or harness is corroded.

Experience has shown that there are often dozens of other defects [worn out items] that typically need replacing WHEN it gets so bad that a check engine light comes on.

[maxnix]

Best read the timing chain guide article and the under plenum hose posts.

Sounds like you have a lot of deferred maintenance issues.