Check Engine Light (MIL) Or SERVICE POWER STEERING Message - keywords C0450 emis1 fuse LLT LY7 P0134 P0135 P0154 P0155 P2088 P2090 P2092 P2094 SES slow speed stiff ves
| Subject: | Check Engine Light (MIL) or SERVICE POWER STEERING Message |
| Models: | 2008 Cadillac CTS |
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
Some customers may comment the check engine light / malfunction indicator light (MIL) is on and or the driver information center (DIC) displays SERVICE POWER STEERING. Further investigation may reveal the EMIS1 15 amp fuse in the underhood fuse block is open. One or more of the DTC listed below may be stored. The cause may be the engine wire harness shorting on an unused heater hose bracket stud on the right engine compartment frame rail.
C0450 | Steering Assist Control Actuator Circuit |
P0134 | HO2S Circuit Insufficient Activity Bank 1 Sensor 1 |
P0135 | HO2S Heater Performance Bank 1 Sensor 1 |
P0154 | HO2S Circuit Insufficient Activity Bank 2 Sensor 1 |
P0155 | HO2S Heater Performance Bank 2 Sensor 1 |
P2088 | Intake Camshaft Position (CMP) Actuator Solenoid Control Circuit Low Voltage Bank 1 |
P2090 | Exhaust Camshaft Position (CMP) Actuator Solenoid Control Circuit Low Voltage Bank 1 |
P2092 | Intake Camshaft Position (CMP) Actuator Solenoid Control Circuit Low Voltage Bank 2 |
P2094 | Exhaust Camshaft Position (CMP) Actuator Solenoid Control Circuit Low Voltage Bank 2 |
Recommendation/Instructions:
Inspect the engine wire harness for contact with the stud (1). Repair the wiring as necessary.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
