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2021 Chevrolet Malibu LS 1.5L Lean
I got this car from another shop with P0089. They replaced the pcm. I reinstalled the original pcm and replaced the high pressure fuel pump. Fuel rail pressure at idle now is about 540 psi. P1101 also present. I cleaned the throttle body and relearned idle...
Summary posted 5/8/2025
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Related Documents & Media | VIN | 1G1ZD5ST4M |
| Engine | 1.5 L / 4 cyl / GAS |
| Delivery | Fuel Injection |
| Emissions | OBD-II Compliant |
| Symptoms | Lean |
| Occurs | Always |
Trouble Codes
| P0089 | Fuel Pressure Regulator 1 Performance |
| P0171 | Fuel System Too Lean (Bank 1) |
| P1101 | ACM Crash Signal Received |
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Vehicle Data
2021 Chevrolet Malibu LS
| VIN | 1G1ZD5ST4M |
| Engine | 1.5 L / 4 cyl / GAS |
| Delivery | Fuel Injection |
| Emissions | OBD-II Compliant |
| Symptoms | Lean |
| Occurs | Always |
Trouble Codes
| P0089 | Fuel Pressure Regulator 1 Performance |
| P0171 | Fuel System Too Lean (Bank 1) |
| P1101 | ACM Crash Signal Received |
Video