P0401 Diagnostic Trouble Code Discussion for October 2017
Insufficient EGR Flow Detected
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| Help Request | Posted | |
| 2000 Chevrolet K3500 7.4L MIL Lamp on VIN: 1GCHK33J1Y P0401: Insufficient EGR Flow Detected. ... check engine light looked at and have the broken exhaust manifold bolts repaired. p0401 was stored as well as an egr position code and throttle position sensor code. Found that the EGR valve was inoperable and the tps had a bad spot. Replaced EGR and TPS. ... |
October 10, 2017 | |
| 2000 Chevrolet K3500 7.4L MIL Lamp on VIN: 1GCHK33J1Y P0401: Insufficient EGR Flow Detected. ... check engine light looked at and have the broken exhaust manifold bolts repaired. p0401 was stored as well as an egr position code and throttle position sensor code. Found that the EGR valve was inoperable and the tps had a bad spot. Replaced EGR and TPS. ... |
October 17, 2017 | |
| 1998 Ford F-150 Lariat 4.6L MIL Lamp on VIN: 1FTZX1761W P0401: Egr flow. ... egr works, 6in of vacuum to the egr valve, engine runs rough during test, doesn't stall. Sets cdoe p1408 witch is KOER test failed for egr flow test failed, same as p0401. Went thru the pinpoint testing for this code and found dpfe voltage off. Problem is,... |
October 18, 2017 |
