P0420 Diagnostic Trouble Code Discussion for December 2023
Catalyst Efficiency Below Normal (Bank 1)
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| Help Request | Posted | |
| 2011 Buick Enclave CXL 3.6L No Start, Stall VIN: 5GAKVCED6B P0420: bank 1 cat. efficency. Hello fellow techs. This one came in on the hook a week ago and we've been trying to figure out what is going on since then. Customer said they were coming off the hwy and the engine stalled without any warning and would not restart. The engine cranks ... |
December 07, 2023 | |
| 2015 Ford F-550 Super Duty XLT 6.8L Surge, MIL Lamp on VIN: 1FDUF5HY8F ... customer, the dealer , then me. Problem is surging under load, cab chasis with flat bed, pulls heavy trailer and jerks bad with trailer on it. Set p0420, and lean codes for both banks don't have my notes at home with sick kid. p219a p219b Maf repla... |
December 19, 2023 |
