1999 mazda b-4000 EGR valve

bigo

Jr. Member
#1
Truck is idling rough, and hesitates on highway. "check engine" light goes on and off. Local auto parts scanner read code ---P1151--- Was told it sounded like a EGR problem ?? We could not find the EGR valve on this engine. ( 4.0 ) Also told it might be a " DPFE" sensor ? Any help in locating these two parts would be a big help. THANKS
 
#2
P1151 on Mazda is "lack of H0S21 switches- sensor indicates lean", related with P2197, which is bank 2 sensor 1 stuck lean. Greetings, Schraube.

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bigo

Jr. Member
#4
SCHRAUBE, Thanks for the info. But, I cannot find parts #1 (dpfe) sensor or part #3 (egr valve) on the engine. What do I need to remove to get to these parts ??
 
#5
Here is a different pic...Looks like the egr valve is by the oil dipstick and the dpfe sensor is on the firewall....hope this helps ....Jim

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bigo

Jr. Member
#6
Thanks JIM for that info, but no luck in locating those two parts. Went to local MAZDA dealer and he sent me to a FORD dealer for help. Guess , i'll just take it to a shop ? Thought I could fix it myself. Thanks everyone !!