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The truck is a 1999 Mazda B2500. I replaced the DPFE sensor a few months ago when this code first appeared, but now the code is back. The symptoms I have are: surging at highway speeds, as well as at idle, poor fuel economy, a slight knock/ pinging sound, and very little power.

2007-07-03 13:09:24 · 4 answers · asked by hicks_engr 1 in Cars & Transportation Maintenance & Repairs

4 answers

Check the hoses going to the DPFE to make sure there are no leaks. If you have a vacuum pump, aplly vacuum to the EGR valve at idle and make sure that you can bog the engine down. Your particular motor is also somewhat prone to the EGR passage in the intake getting clogged with carbon in which case you would need to remove the intake and clean it out.

2007-07-03 13:21:28 · answer #1 · answered by mikeim2 3 · 1 0

On some vehicles, a p0402 is desperate because of the EGR sticking which will additionally usually reason an fairly tough or obtainable no idle difficulty. On Fords, as somebody reported, we very infrequently clean or replace EGRs themselves.... (Blocked passages have been known to set P0401s) usually a p0402 is desperate on a Ford while the DPFE sensor, that's a sensor to study the quantity of gases flowing by way of the EGR tube, shorts out internally. this is a elementary difficulty to the element that each and every DPFE from 1993-approximately 2004 has had a minimum of one revised section variety to remedy this difficulty (because of the fact the cargirl reported, this is often shorted to the 5 volts the engine computing gadget sends to the sensor so It reads very severe in voltage (everyday is .6 or a million.0v dependng upon the motor vehicle) i could say a DPFE (ford base variety 9J460) and the hoses (9p761) that circulate alongside with it may restore you up .... make helpful you disconnect the battery to clean codes and study issues because of the undesirable DPFE earlier doing this paintings.

2016-11-08 02:24:35 · answer #2 · answered by ? 4 · 0 0

Most of the time the port under the egr valve gets plugged.Have a local shop remove the egr valve and clean the port and this should correct your problem.

2007-07-03 13:20:10 · answer #3 · answered by HyperGforce 7 · 1 0

check your vacuum hoses for a leak. also the EGR value could be bad! I had trouble with mine a few years ago.

2007-07-03 13:12:50 · answer #4 · answered by Ivan S 6 · 0 0

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