P1121
Throttle Position Lower Than Expected
1997-1997 Acura CL 2.2L I4
Moderate SeverityPowertrain
The 1997 Acura CL is equipped with a 2.2L inline-4 engine. Below you'll find detailed p1121 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
The TPS reading is lower than expected for current conditions.
Symptoms
- CEL
- Poor acceleration
- Stumbling
- Erratic idle
- Limp mode
Common Causes
- Faulty TPS
- Sticking throttle
- Carbon buildup
- Damaged wiring
Diagnostic Steps
- Monitor TPS with scan tool
- Clean throttle body
- Inspect wiring
- Test TPS
Repair Notes
Clean throttle body or replace TPS.
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1121 on Other Vehicles
Common Questions
What does code P1121 mean on a 1997-1997 Acura CL?
P1121 stands for "Throttle Position Lower Than Expected". The TPS reading is lower than expected for current conditions.
What are the symptoms of P1121 on a Acura CL?
Common symptoms of P1121 include: CEL, Poor acceleration, Stumbling, Erratic idle, Limp mode.
What causes P1121 on a 1997-1997 Acura CL?
Common causes of P1121 include: Faulty TPS, Sticking throttle, Carbon buildup, Damaged wiring.
Last updated: March 2026