Vehicle: 2015 Jeep Grand Cherokee, 4WD, V6-3.0L DSL Turbo, Automatic Transmission/Transaxle
Mileage: 158,439
Problem: The customer’s concern was that the malfunction indicator light (MIL) was on. There were no noticeable drivability issues reported.
Tech Tip or Prank?
TECH TIP!
Case Details: The first thing the technician did was to check for diagnostic trouble codes (DTCs). He found the following two codes:
- P1297-00 EGR Slow Response – Decreasing Flow
- P026C-00 Fuel Injection Quantity Lower Than Expected
Based on the DTCs and a visual inspection, the technician replaced the exhaust gas recycle (EGR) valve and EGR cooler which were full of carbon. He cleared the DTCs, but they quickly returned after a test drive.
A quick call was made to ALLDATA Tech-Assist for some diagnostic advice. The Tech-Assist consultant recommended inspecting for vacuum leaks because they could also cause both those DTCs.
During the inspection, the technician found the cam sensor had a damaged O-ring that could be leaking vacuum.
Confirmed Repair: He replaced the cam sensor O-ring, cleared the DTCs, then went on a long road test. No further issues. Fixed!
The ALLDATA Tech-Assist team fields cases like this every day. See how Tech-Assist can help your shop save time and money with on-call diagnostic support from ASE-certified Master Technicians. More Tech Tips
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