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· Registered
2002 escalade
2 Posts
Discussion Starter · #1 ·
Need help with multiple codes that popped up today. P0171, P0174, P0401, P1515, C0212, C0286,
C0298, P0106. Was driving and all of a sudden went to half power and all bells and whistles started going off. Wouldn't go more than 10mph. What could cause all this at one time?

· Super Moderator
2010 Platinum Escalade, 1996 Fleetwood Brougham
6,511 Posts
Lean bank 1&2 --

The MAF (Mass Air Flow) Sensor is dirty or faulty Note:
The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry. There could be a vacuum leak downstream of the MAF sensor Possible cracked vacuum or PCV line/connection Faulty or stuck open PCV valve Failed or faulty oxygen sensor (bank 1, sensor 1) Sticking/plugged or failed fuel injector Low fuel pressure (possible plugged/dirty fuel filter!) Exhaust leak between engine and first oxygen sensor

Insufficient EGR flow --

The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced
There is a blockage in the EGR (tube), most likely carbon buildup
The EGR valve is faulty
The EGR valve may not be opening due to a lack of vaccuum

Control Module Throttle Actuator --

Possible dirty throttle body

Yaw Rate Sensor Circuit
MPA Switch Circuit
Powertrain Indicated Traction Control Malfunction

MAP sensor --

Bad MAP sensor Water/dirt intrusion affecting MAP sensor connector
Intermittent open in the reference, ground, or signal wire for the MAP sensor
Intermittent short in the reference, ground, or signal wire for the MAP sensor
Ground problem due to corrosion causing intermittent signal problem
A break in the flexible air intake duct between the MAF and the intake manifold
Bad PCM (do not assume the PCM is bad until you've exhausted all other possibilities)

C codes could be related to the EBCM.
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